CVE-2026-63002

REDAXO: Stored XSS in Mediapool Sync Page via Unescaped Filesystem Filenames

Published Sep 23, 2026 CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-w998-qmw9-mf4m REDAXO: Stored XSS in Mediapool Sync Page via Unescaped Filesystem Filenames
History
Type Values Removed Values Added
First Time appeared Redaxo redaxo
CPEs cpe:2.3:a:redaxo:redaxo:*:*:*:*:*:*:*:*
Vendors & Products Redaxo redaxo
Type Values Removed Values Added
Metrics ssvc

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

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 24, 2026, 2:26 PM
Reserved
Jul 14, 2026, 11:10 PM
Status
Analyzed
Published
Sep 23, 2026, 3:17 PM
Modified
Oct 19, 2026, 8:36 PM