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.
History

Mon, 19 Oct 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Redaxo redaxo
CPEs cpe:2.3:a:redaxo:redaxo:*:*:*:*:*:*:*:*
Vendors & Products Redaxo redaxo

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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-09-23T14:05:39.056Z

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 : Analyzed

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

Modified: 2026-10-19T20:36:13.477

Link: CVE-2026-63002

cve-icon Redhat

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