Vulnerability Description
REDAXO 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/redaxo/core/commit/2daaa3a30570bc76a82f63fd21fb8c9c2cd5dc7c
- https://github.com/redaxo/core/pull/6581
- https://github.com/redaxo/core/releases/tag/5.21.2
- https://github.com/redaxo/core/security/advisories/GHSA-mf2p-wjp4-99pq
FAQ
What is CVE-2026-63001?
CVE-2026-63001 is a vulnerability with a CVSS score of 4.8 (MEDIUM). REDAXO 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...
How severe is CVE-2026-63001?
CVE-2026-63001 has been rated MEDIUM with a CVSS base score of 4.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-63001?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.