CVE-2026-63002CWE-79cross-site-scripting

CVE-2026-63002

Medium · published September 23, 2026

CVSS v3.1
4.8
EPSS
0%
Percentile
7.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00186 · 7.8th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-23T19:17Z
Affected products (1)
ProductVersionsFixed in
redaxo/redaxo< 5.21.25.21.2
References (5)
https://github.com/redaxo/core/commit/2daaa3a30570bc76a82f63fd21fb8c9c2cd5dc7c · [email protected]https://github.com/redaxo/core/pull/6581 · [email protected]https://github.com/redaxo/core/releases/tag/5.21.2 · [email protected]https://github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4m · [email protected]https://github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4m · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 25 SEP 03:26Z
    EPSS moved — → 0%
    epss
  • 23 SEP 14:05Z
    REDAXO: Stored XSS in Mediapool Sync Page via Unescaped Filesystem Filenames
    cvelistv5