{"id":"CVE-2024-31981","aliases":["GHSA-vxwr-wpjv-qjq7"],"url":"https://o3.security/vulnerability/CVE-2024-31981","summary":"XWiki Platform: Privilege escalation (PR) from user registration through PDFClass","details":"### Impact\nRemote code execution is possible via PDF export templates.\nTo reproduce on an installation, register a new user account with username `PDFClass` if `XWiki.PDFClass` does not exist.\nOn `XWiki.PDFClass`, use the class editor to add a \"style\" property of type \"TextArea\" and content type \"Plain Text\".\nThen, add an object of class `PDFClass` and set the \"style\" attribute to `$services.logging.getLogger('PDFClass').error(\"I got programming: $services.security.authorization.hasAccess('programming')\")`.\nFinally, go to `<host>/xwiki/bin/export/Main/WebHome?format=pdf&pdftemplate=XWiki.PDFClass`. If the logs contain \"ERROR PDFClass - I got programming: true\", the instance is vulnerable.\n\n### Patches\nThis vulnerability has been patched in XWiki 14.10.20, 15.5.4 and 15.10-rc-1.\n\n### Workarounds\nIf PDF templates are not typically used on the instance, an administrator can create the document `XWiki.PDFClass` and block its edition, after making sure that it does not contain a `style` attribute.\nOtherwise, the instance needs to be updated.\n\n### References\n- https://jira.xwiki.org/browse/XWIKI-21337\n- https://github.com/xwiki/xwiki-platform/commit/d28e21a670c69880b951e415dd2ddd69d273eae9\n","published":"2024-04-10T19:22:57.494Z","modified":"2026-08-12T15:15:13.129339Z","cvss":{"score":9.9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Maven","name":"org.xwiki.platform:xwiki-platform-oldcore","fixedVersion":"14.10.20"},{"ecosystem":"Maven","name":"org.xwiki.platform:xwiki-platform-oldcore","fixedVersion":"15.5.4"},{"ecosystem":"Maven","name":"org.xwiki.platform:xwiki-platform-oldcore","fixedVersion":"15.10-rc-1"}],"fix":{"url":"https://github.com/xwiki/xwiki-platform/commit/480186f9d2fca880513da8bc5a609674d106cbd3","label":"xwiki/xwiki-platform@480186f"},"references":[{"type":"WEB","url":"https://jira.xwiki.org/browse/XWIKI-21337"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/31xxx/CVE-2024-31981.json"},{"type":"ADVISORY","url":"https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-vxwr-wpjv-qjq7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-31981"},{"type":"FIX","url":"https://github.com/xwiki/xwiki-platform/commit/480186f9d2fca880513da8bc5a609674d106cbd3"},{"type":"FIX","url":"https://github.com/xwiki/xwiki-platform/commit/a4ad14d9c1605a5ab957237e505ebbb29f5b9d73"},{"type":"FIX","url":"https://github.com/xwiki/xwiki-platform/commit/d28e21a670c69880b951e415dd2ddd69d273eae9"},{"type":"PACKAGE","url":"https://github.com/xwiki/xwiki-platform"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T15:15:13.129339Z"}}