CVE-2026-63002

MediumCVSS 4.8/10Last modified Oct 19, 2026

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.

Metrics

CVSS 3.1 4.8/10CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

Vendor	Product	Versions
redaxo	core	< 5.21.2

References

https://github.com/redaxo/core/commit/2daaa3a30570bc76a82f63fd21fb8c9c2cd5dc7cPatch
https://github.com/redaxo/core/pull/6581Issue Tracking, Patch
https://github.com/redaxo/core/releases/tag/5.21.2Release Notes
https://github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4mExploit, Vendor Advisory
https://github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4mExploit, Vendor Advisory

Timeline

Published: Sep 23, 2026
Last modified: Oct 19, 2026
NVD status: Analyzed

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