{"id":"GHSA-wgmf-q9vr-vww6","aliases":["CVE-2024-45046"],"title":"PhpSpreadsheet HTML writer is vulnerable to Cross-Site Scripting via style information","titleSource":"OSV","descriptionSource":"OSV","declaredSeverity":"MODERATE","description":"### Summary\n\n`\\PhpOffice\\PhpSpreadsheet\\Writer\\Html` doesn't sanitize spreadsheet styling information such as font names, allowing an attacker to inject arbitrary JavaScript on the page.\n\n### PoC\n\nExample target script:\n\n```\n<?php\n\nrequire 'vendor/autoload.php';\n\n$reader = \\PhpOffice\\PhpSpreadsheet\\IOFactory::createReader(\"Xlsx\");\n$spreadsheet = $reader->load(__DIR__ . '/book.xlsx');\n\n$writer = new \\PhpOffice\\PhpSpreadsheet\\Writer\\Html($spreadsheet);\nprint($writer->generateHTMLAll());\n```\n\nSave this file in the same directory:\n[book.xlsx](https://github.com/PHPOffice/PhpSpreadsheet/files/15212797/book.xlsx)\n\nOpen index.php in a web browser. An alert should be displayed.\n\n### Impact\n\nFull takeover of the session of users viewing spreadsheet files as HTML.","severity":"medium","score":5.4,"published":"2024-08-29T17:56:56.000Z","modified":"2025-03-06T18:36:59.605Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"phpoffice/phpspreadsheet","sources":[{"name":"OSV · GHSA-wgmf-q9vr-vww6","url":"https://osv.dev/vulnerability/GHSA-wgmf-q9vr-vww6"}],"ranges":[{"events":[{"introduced":"2.0.0"},{"fixed":"2.1.0"}],"type":"ECOSYSTEM"}],"versions":["2.0.0"],"fixed":["2.1.0"]},{"ecosystem":"Packagist","name":"phpoffice/phpspreadsheet","sources":[{"name":"OSV · GHSA-wgmf-q9vr-vww6","url":"https://osv.dev/vulnerability/GHSA-wgmf-q9vr-vww6"}],"ranges":[{"events":[{"introduced":"0"},{"fixed":"1.29.1"}],"type":"ECOSYSTEM"}],"versions":["1.0.0","1.0.0-beta","1.0.0-beta2","1.1.0","1.10.0","1.10.1","1.11.0","1.12.0","1.13.0","1.14.0","1.14.1","1.15.0","1.16.0","1.17.0","1.17.1","1.18.0","1.19.0","1.2.0","1.2.1","1.20.0","1.21.0","1.22.0","1.23.0","1.24.0","1.24.1","1.25.0","1.25.1","1.25.2","1.26.0","1.27.0","1.27.1","1.28.0","1.29.0","1.3.0","1.3.1","1.4.0","1.4.1","1.5.0","1.5.1","1.5.2","1.6.0","1.7.0","1.8.0","1.8.1","1.8.2","1.9.0"],"fixed":["1.29.1"]},{"ecosystem":"Packagist","name":"phpoffice/phpexcel","sources":[{"name":"OSV · GHSA-wgmf-q9vr-vww6","url":"https://osv.dev/vulnerability/GHSA-wgmf-q9vr-vww6"}],"ranges":[{"events":[{"introduced":"0"},{"last_affected":"1.8.2"}],"type":"ECOSYSTEM"}],"versions":["1.7.9","1.7.9-rc1","1.8.0","1.8.0rc1","1.8.0rc2","1.8.0rc3","1.8.0rc4","1.8.1","1.8.2"],"fixed":[]}],"sourceAffected":[],"references":["https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-wgmf-q9vr-vww6","https://nvd.nist.gov/vuln/detail/CVE-2024-45046","https://github.com/PHPOffice/PhpSpreadsheet/pull/3957","https://github.com/PHPOffice/PhpSpreadsheet/commit/f7cf378faed2e11cf4825bf8bafea4922ae44667","https://github.com/PHPOffice/PhpSpreadsheet"],"sources":[{"name":"OSV","id":"GHSA-wgmf-q9vr-vww6","modified":"2025-03-06T18:36:59.605226Z","url":"https://osv.dev/vulnerability/GHSA-wgmf-q9vr-vww6"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","score":5.4},{"source":"OSV","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","score":4.8}],"products":[],"remediation":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T09:15:31.408Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}