REDAXO: Stored XSS in Mediapool Sync Page via Unescaped Filesystem Filenames

Summary The mediapool sync page sync.php renders filenames from the /media filesystem directory directly into HTML without applying rexescape i.e., htmlspecialchars. Any file placed in the media directory whose filename contains HTML metacharacters will execute JavaScript in the browser of any...

EUVD-2026-85331

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 rexescape. An attacker who can place an unregistered file with HTML metacharacters in th...