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.
Affected products
redaxo: redaxo
References5
- github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4m ExploitVendor Advisory
- github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4m 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
Could this be exploited in your environment?
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