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.
Affected products
redaxo: redaxo
References4
- github.com/redaxo/core/security/advisories/GHSA-mf2p-wjp4-99pq ExploitVendor Advisory
- github.com/redaxo/core/commit/2daaa3a30570bc76a82f63fd21fb8c9c2… Patch
- github.com/redaxo/core/pull/6581 Issue TrackingPatch
- github.com/redaxo/core/releases/tag/5.21.2 Release Notes
Metrics
- CVSS 3.1
-
4.8
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 9 · as of 9 November 2026
- CWE
- CWE-79
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