CVE-2026-41656: Admidio

Medium severity, CVSS 4.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Admidio is an open-source user management solution. Prior to version 5.0.9, the add mode in modules/documents-files.php accepts a name parameter validated only as 'string' type (HTML encoding), allowing path traversal characters (../) to pass through unfiltered. Combined with the absence of CSRF protection on this endpoint and SameSite=Lax session cookies, a low-privileged attacker can trick a documents administrator into clicking a crafted link that registers an arbitrary server file (e.g., install/config.php containing database credentials) into a documents folder accessible to the attacker. This issue has been patched in version 5.0.9.

Affected products

• Admidio Admidio: before 5.0.9 (fixed in 5.0.9)

Published 2026-05-07. Last modified 2026-06-17.