CVE-2026-63002

MEDIUM 4.8

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

CVSS Score

4.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	redaxo
Product	core
Published	Sep 23, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

redaxo / core

< 5.21.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4m github.com: https://github.com/redaxo/core/pull/6581 github.com: https://github.com/redaxo/core/commit/2daaa3a30570bc76a82f63fd21fb8c9c2cd5dc7c github.com: https://github.com/redaxo/core/releases/tag/5.21.2