CVE-2026-63002
Medium
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.
SeverityMedium
CVSS4.8
Exploit probability—
Product
Redaxo
PublishedSep 23, 2026
First seenSep 23, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- redaxo redaxo5.21.2 or later
- redaxo/source5.21.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| redaxo redaxo | v < 5.21.2 | 5.21.2 |
| redaxo/sourcePackagist | v < 5.21.2 | 5.21.2 |
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