{"items":[{"id":"NVI-00006185","kind":"vulnerability","title":"PhpSpreadsheet allows unauthorized Reflected XSS in `Convert-Online.php` file","revision":4,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-x88g-h956-m5xg","CVE-2024-56408"],"plain_summary":"OSV carries this publisher advisory for phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpexcel. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 3.7.0 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 1.29.7 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.1.6 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.3.5 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-00c4209e0d2d7ca3035ff28265443436"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-06-17T08:12:09.140Z","value":"5.4 MEDIUM (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-4582160530d6a23b2a710f23fad523bb"},{"kind":"CVSS","as_of":"2026-06-17T08:12:09.140Z","value":"8.3 HIGH (4.0)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-4582160530d6a23b2a710f23fad523bb"},{"kind":"EPSS","as_of":"2026-11-03T12:00:27.000Z","value":"0.414%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.35702. Missing scores are unknown.","source_id":"sr-00c4209e0d2d7ca3035ff28265443436"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-aa9d251d1cf0e2ef0fc16a81649ee2a7","url":"https://github.com/advisories/GHSA-x88g-h956-m5xg","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-x88g-h956-m5xg","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:51.442Z"},{"id":"sr-4582160530d6a23b2a710f23fad523bb","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56408","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2024-56408","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T00:59:51.327Z"},{"id":"sr-00c4209e0d2d7ca3035ff28265443436","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2024-56408","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:44:07.764Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 3.0.0; fixed 3.7.0"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.29.7"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 2.0.0; fixed 2.1.6"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 2.2.0; fixed 2.3.5"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpexcel","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 0; last_affected 1.8.2"]}],"null_published_at":"2026-11-04T10:04:41.527Z","source_updated_at":"2026-09-10T03:50:56.511Z","source_disclosed_at":"2025-01-03T16:05:26.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:42:51.442Z"},{"id":"NVI-00006185","kind":"vulnerability","title":"PhpSpreadsheet allows unauthorized Reflected XSS in `Convert-Online.php` file","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-x88g-h956-m5xg","CVE-2024-56408"],"plain_summary":"OSV carries this publisher advisory for phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpexcel. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 3.7.0 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 1.29.7 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.1.6 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.3.5 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-0333c688897f1880a348845db372f9fb"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-06-17T08:12:09.140Z","value":"5.4 MEDIUM (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-4582160530d6a23b2a710f23fad523bb"},{"kind":"CVSS","as_of":"2026-06-17T08:12:09.140Z","value":"8.3 HIGH (4.0)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-4582160530d6a23b2a710f23fad523bb"},{"kind":"EPSS","as_of":"2026-11-01T12:00:16.000Z","value":"0.414%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.35666. Missing scores are unknown.","source_id":"sr-0333c688897f1880a348845db372f9fb"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-aa9d251d1cf0e2ef0fc16a81649ee2a7","url":"https://github.com/advisories/GHSA-x88g-h956-m5xg","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-x88g-h956-m5xg","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:51.442Z"},{"id":"sr-4582160530d6a23b2a710f23fad523bb","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56408","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2024-56408","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T00:59:51.327Z"},{"id":"sr-0333c688897f1880a348845db372f9fb","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2024-56408","publisher":"FIRST EPSS","observed_at":"2026-11-01T14:28:32.256Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 3.0.0; fixed 3.7.0"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.29.7"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 2.0.0; fixed 2.1.6"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 2.2.0; fixed 2.3.5"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpexcel","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 0; last_affected 1.8.2"]}],"null_published_at":"2026-11-02T20:21:07.767Z","source_updated_at":"2026-09-10T03:50:56.511Z","source_disclosed_at":"2025-01-03T16:05:26.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:42:51.442Z"},{"id":"NVI-00006185","kind":"vulnerability","title":"PhpSpreadsheet allows unauthorized Reflected XSS in `Convert-Online.php` file","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-x88g-h956-m5xg","CVE-2024-56408"],"plain_summary":"OSV carries this publisher advisory for phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpexcel. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 3.7.0 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 1.29.7 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.1.6 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.3.5 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-4582160530d6a23b2a710f23fad523bb"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-06-17T08:12:09.140Z","value":"5.4 MEDIUM (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-4582160530d6a23b2a710f23fad523bb"},{"kind":"CVSS","as_of":"2026-06-17T08:12:09.140Z","value":"8.3 HIGH (4.0)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-4582160530d6a23b2a710f23fad523bb"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-aa9d251d1cf0e2ef0fc16a81649ee2a7","url":"https://github.com/advisories/GHSA-x88g-h956-m5xg","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-x88g-h956-m5xg","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:51.442Z"},{"id":"sr-4582160530d6a23b2a710f23fad523bb","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56408","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2024-56408","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T00:59:51.327Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 3.0.0; fixed 3.7.0"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.29.7"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 2.0.0; fixed 2.1.6"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 2.2.0; fixed 2.3.5"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpexcel","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 0; last_affected 1.8.2"]}],"null_published_at":"2026-11-01T01:04:04.828Z","source_updated_at":"2026-09-10T03:50:56.511Z","source_disclosed_at":"2025-01-03T16:05:26.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:42:51.442Z"},{"id":"NVI-00006185","kind":"vulnerability","title":"PhpSpreadsheet allows unauthorized Reflected XSS in `Convert-Online.php` file","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-x88g-h956-m5xg","CVE-2024-56408"],"plain_summary":"OSV carries this publisher advisory for phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpexcel. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 3.7.0 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 1.29.7 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.1.6 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.3.5 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-aa9d251d1cf0e2ef0fc16a81649ee2a7","url":"https://github.com/advisories/GHSA-x88g-h956-m5xg","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-x88g-h956-m5xg","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:51.442Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 3.0.0; fixed 3.7.0"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.29.7"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 2.0.0; fixed 2.1.6"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 2.2.0; fixed 2.3.5"]},{"certainty":"source_listed","source_ids":["sr-aa9d251d1cf0e2ef0fc16a81649ee2a7"],"technology":"phpoffice/phpexcel","known_exclusions":[],"conditions_summary":"# Unauthorized Reflected XSS in `Convert-Online.php` file\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\n**CVSS vector v.4.0**: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` script, an attacker can perform a XSS-type attack \n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the quantity variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Convert-Online.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Engineering/Convert-Online.php` file, which leads to the possibility of a XSS attack.\n\n![fig4](https://github.co","public_affected_ranges":["ECOSYSTEM: introduced 0; last_affected 1.8.2"]}],"null_published_at":"2026-10-31T22:13:05.873Z","source_updated_at":"2026-09-10T03:50:56.511Z","source_disclosed_at":"2025-01-03T16:05:26.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T21:42:51.442Z"}],"next_cursor":null,"snapshot_revision":"42594"}