medium4.8
CVE-2026-63002
REDAXO: Stored XSS in Mediapool Sync Page via Unescaped Filesystem Filenames
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | redaxo/source | <= 5.21.1 | 5.21.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Redaxo | Redaxo | before 5.21.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-w998-qmw9-mf4m
- https://github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4m
- https://github.com/redaxo/core/pull/6581
- https://github.com/redaxo/core/commit/2daaa3a30570bc76a82f63fd21fb8c9c2cd5dc7c
- https://github.com/redaxo/core/releases/tag/5.21.2