Medium 4.8Published Sep 23, 2026

CVE-2026-63002REDAXO: Stored XSS in Mediapool Sync Page via Unescaped Filesystem Filenames

Updated under an hour ago (Oct 26, 2026, 7:20 AM ET)

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It affects redaxo core and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 4.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Sep 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

redaxo core redaxo:core (from the name)	before 5.21.2	CNA record
redaxo redaxo redaxo:redaxo	before 5.21.2	NVD

References

https://github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4mx-refsource-confirm, exploit, vendor-advisory
https://github.com/redaxo/core/pull/6581x-refsource-misc, issue-tracking, patch
https://github.com/redaxo/core/commit/2daaa3a30570bc76a82f63fd21fb8c9c2cd5dc7cx-refsource-misc, patch
https://github.com/redaxo/core/releases/tag/5.21.2x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.