{"id":"CVE-2026-63002","published":"2026-09-23T15:17:15.770","lastModified":"2026-09-24T15:17:26.490","description":"REDAXO is a PHP-based content management system. Prior to 5.21.2, redaxo/src/addons/mediapool/pages/sync.php inserts filenames held in $diffFiles from the media filesystem into the Mediapool Sync page without rex_escape(). An attacker who can place an unregistered file with HTML metacharacters in the media directory can execute script in the browser of a backend user with media[sync] permission when that user opens the Sync page, enabling session theft or unauthorized backend actions. This issue is fixed in version 5.21.2.","cvssScore":4.8,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","cwes":["CWE-79"],"vendors":[],"products":[],"references":[{"url":"https://github.com/redaxo/core/commit/2daaa3a30570bc76a82f63fd21fb8c9c2cd5dc7c","tags":[]},{"url":"https://github.com/redaxo/core/pull/6581","tags":[]},{"url":"https://github.com/redaxo/core/releases/tag/5.21.2","tags":[]},{"url":"https://github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4m","tags":[]},{"url":"https://github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4m","tags":[]}],"exploitRefs":[{"url":"https://github.com/redaxo/core/commit/2daaa3a30570bc76a82f63fd21fb8c9c2cd5dc7c","tags":[]},{"url":"https://github.com/redaxo/core/pull/6581","tags":[]},{"url":"https://github.com/redaxo/core/releases/tag/5.21.2","tags":[]},{"url":"https://github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4m","tags":[]},{"url":"https://github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4m","tags":[]}],"hasPoc":true,"ai":null}