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.

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Vendors Products
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-w998-qmw9-mf4m REDAXO: Stored XSS in Mediapool Sync Page via Unescaped Filesystem Filenames
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 24 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 23 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
First Time appeared Redaxo
Redaxo core
Vendors & Products Redaxo
Redaxo core

Wed, 23 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
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.
Title REDAXO: Stored XSS in Mediapool Sync Page via Unescaped Filesystem Filenames
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-24T14:26:12.432Z

Reserved: 2026-07-14T23:10:57.032Z

Link: CVE-2026-63002

cve-icon Vulnrichment

Updated: 2026-09-24T14:25:45.498Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-09-23T15:17:15.770

Modified: 2026-09-24T15:17:26.490

Link: CVE-2026-63002

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-23T16:15:06Z

Weaknesses