23 Oct 2026 15:48:27 UTC
REDAXO: Stored XSS via Unescaped Media Manager Type Name in `mediaIsInUse()`
cve-program · CVE-2026-63001 · Published
CVE-2026-63001
REDAXO: Stored XSS via Unescaped Media Manager Type Name in `mediaIsInUse()`
CVSS 3.1 4.8 MEDIUMCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-63001
PublishedREDAXO is a PHP-based content management system. Prior to 5.21.2, the mediaIsInUse() handler in redaxo/src/addons/media_manager/lib/media_manager.php inserts a Media Manager type name into raw backend warning HTML without escaping it when invoked through MEDIA_IS_IN_USE. An administrator with Media Manager access can store HTML in a type name, and the payload executes in another administrator's browser when that administrator tries to delete media referenced by the type's effects, enabling session theft or unauthorized backend actions. This issue is fixed in version 5.21.2.
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