{"items":[{"id":"NVI-00008247","kind":"vulnerability","title":"PhpSpreadsheet has a Cross-Site Scripting (XSS) vulnerability of the hyperlink base in the HTML page header","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-hwcp-2h35-p66w","CVE-2024-56411"],"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-fbe64f5d0e9f0930aaed74b19f130580"],"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-fbe64f5d0e9f0930aaed74b19f130580"],"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-fbe64f5d0e9f0930aaed74b19f130580"],"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-fbe64f5d0e9f0930aaed74b19f130580"],"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-04db31cc4cef6ad71d84706626180b30"],"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":"2026-06-17T08:12:09.520Z","value":"5.4 MEDIUM (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-7c26bea5bcdd481212d633af2b86a733"},{"kind":"CVSS","as_of":"2026-06-17T08:12:09.520Z","value":"4.8 MEDIUM (4.0)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-7c26bea5bcdd481212d633af2b86a733"},{"kind":"EPSS","as_of":"2026-11-05T12:03:04.000Z","value":"0.369%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.30908. Missing scores are unknown.","source_id":"sr-04db31cc4cef6ad71d84706626180b30"}],"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-fbe64f5d0e9f0930aaed74b19f130580","url":"https://github.com/advisories/GHSA-hwcp-2h35-p66w","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-hwcp-2h35-p66w","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.433Z"},{"id":"sr-7c26bea5bcdd481212d633af2b86a733","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56411","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2024-56411","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-02T09:56:51.756Z"},{"id":"sr-04db31cc4cef6ad71d84706626180b30","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-2024-56411","publisher":"FIRST EPSS","observed_at":"2026-11-06T00:24:57.613Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-fbe64f5d0e9f0930aaed74b19f130580"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"# Cross-Site Scripting (XSS) vulnerability of the hyperlink base in the HTML page header\n\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**: 5.4 (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)\n**CVSS vector v.4.0**: 4.8 (AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N)\n**Description**: the HTML page is formed without sanitizing the hyperlink base\n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: class `PhpOffice\\PhpSpreadsheet\\Writer\\Html`, method `generateHTMLHeader`\n**Exploitation conditions**: a user viewing a specially generated Excel file\n**Mitigation**: additional sanitization of special characters in a string\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Cross-Site Scripting (XSS) vulnerability of the hyperlink base in the HTML page header in Phpspreadsheet.\nThe following code is written on the server, which translates the XLSX file into a HTML representation and displays it in the response.\n\n*Listing 8. Source code on the server*\n\n```\n