CVE-2025-66571: Unknown Una CMS

Critical severity, CVSS 9.3. EPSS: 0.6% chance of exploitation in the next 30 days.

UNA CMS versions 9.0.0-RC1 - 14.0.0-RC4 contain a PHP object injection vulnerability in BxBaseMenuSetAclLevel.php where the profile_id POST parameter is passed to PHP unserialize() without proper handling, allowing remote, unauthenticated attackers to inject arbitrary PHP objects and potentially write and execute arbitrary PHP code.

Affected products

• Unknown Una CMS: from 9.0.0-RC1, up to and including 14.0.0-RC4

Published 2025-12-04. Last modified 2026-06-17.