{"id":"GHSA-wgmf-q9vr-vww6","summary":"PhpSpreadsheet HTML writer is vulnerable to Cross-Site Scripting via style information","details":"### 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\u003c?php\n\nrequire 'vendor/autoload.php';\n\n$reader = \\PhpOffice\\PhpSpreadsheet\\IOFactory::createReader(\"Xlsx\");\n$spreadsheet = $reader-\u003eload(__DIR__ . '/book.xlsx');\n\n$writer = new \\PhpOffice\\PhpSpreadsheet\\Writer\\Html($spreadsheet);\nprint($writer-\u003egenerateHTMLAll());\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.","aliases":["CVE-2024-45046"],"modified":"2025-03-06T18:36:59.605226Z","published":"2024-08-29T17:56:56Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2024-08-29T17:56:56Z","nvd_published_at":"2024-08-28T21:15:06Z","cwe_ids":["CWE-79"],"severity":"MODERATE"},"references":[{"type":"WEB","url":"https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-wgmf-q9vr-vww6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-45046"},{"type":"WEB","url":"https://github.com/PHPOffice/PhpSpreadsheet/pull/3957"},{"type":"WEB","url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/f7cf378faed2e11cf4825bf8bafea4922ae44667"},{"type":"PACKAGE","url":"https://github.com/PHPOffice/PhpSpreadsheet"}],"affected":[{"package":{"name":"phpoffice/phpspreadsheet","ecosystem":"Packagist","purl":"pkg:composer/phpoffice/phpspreadsheet"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.1.0"}]}],"versions":["2.0.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/08/GHSA-wgmf-q9vr-vww6/GHSA-wgmf-q9vr-vww6.json"}},{"package":{"name":"phpoffice/phpspreadsheet","ecosystem":"Packagist","purl":"pkg:composer/phpoffice/phpspreadsheet"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.29.1"}]}],"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"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/08/GHSA-wgmf-q9vr-vww6/GHSA-wgmf-q9vr-vww6.json"}},{"package":{"name":"phpoffice/phpexcel","ecosystem":"Packagist","purl":"pkg:composer/phpoffice/phpexcel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.8.2"}]}],"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"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/08/GHSA-wgmf-q9vr-vww6/GHSA-wgmf-q9vr-vww6.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},{"type":"CVSS_V4","score":"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"}]}