What is CVE-2026-63002?

CVE-2026-63002 is a medium-severity vulnerability in Redaxo Core, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-09-23.

How severe is CVE-2026-63002?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Redaxo Core

CVE-2026-63002

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-09-23 · last modified 2026-09-23.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Redaxo Core — versions < 5.21.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-63002?: CVE-2026-63002 is a medium-severity vulnerability in Redaxo Core, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-09-23.
How severe is CVE-2026-63002?: Medium severity. CVSS v3 base score is 4.8 out of 10.