{"items":[{"id":"NVI-00007167","kind":"vulnerability","title":"PhpSpreadsheet allows bypassing of XSS sanitizer using the javascript protocol and special characters","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-r57h-547h-w24f","CVE-2025-23210"],"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 3.9.0 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-d1af9c7bcbaa2ae522ac3f9df6c4a81c"],"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 1.29.9 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-d1af9c7bcbaa2ae522ac3f9df6c4a81c"],"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 2.3.7 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-d1af9c7bcbaa2ae522ac3f9df6c4a81c"],"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 2.1.8 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-d1af9c7bcbaa2ae522ac3f9df6c4a81c"],"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-35af589b7a9b8d5e79825aed2215c48d"],"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":"2026-06-17T08:52:39.970Z","value":"4.8 MEDIUM (4.0)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-0a05efad84423ad0b6034fbfa145e34c"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.415%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.35844. Missing scores are unknown.","source_id":"sr-35af589b7a9b8d5e79825aed2215c48d"}],"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-d1af9c7bcbaa2ae522ac3f9df6c4a81c","url":"https://github.com/advisories/GHSA-r57h-547h-w24f","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-r57h-547h-w24f","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:41.356Z"},{"id":"sr-0a05efad84423ad0b6034fbfa145e34c","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-23210","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2025-23210","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T01:39:15.478Z"},{"id":"sr-35af589b7a9b8d5e79825aed2215c48d","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-2025-23210","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.370Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-d1af9c7bcbaa2ae522ac3f9df6c4a81c"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"**Product:** PhpSpreadsheet\n**Version:** 3.8.0\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:** an attacker can use special characters, so that the library processes the javascript protocol with special characters and generates an HTML link\n**Impact:** executing arbitrary JavaScript code in the browser\n**Vulnerable component:** class `PhpOffice\\PhpSpreadsheet\\Writer\\Html`, method `generateRow`\n**Exploitation conditions:** a user viewing a specially generated xml file\n**Mitigation:** additional sanitization of special characters in a string\n**Researcher: Igor Sak-Sakovskiy (Positive Technologies)**\n\n# Research\n\nThe researcher discovered zero-day vulnerability Bypass XSS sanitizer using the javascript protocol and special characters in Phpspreadsheet.\nThe following code is written on the server, which translates the XML file into an HTML representation and displays it in the response.\n\n*Listing 4. Source code on the server*\n\n```\n