CVE-2026-71294: Cotonti

High severity, CVSS 7.6. EPSS: 0.4% chance of exploitation in the next 30 days.

Cotonti CMS's Comments plugin deserializes user-supplied data without restricting the classes that may be instantiated. In plugins/comments/controllers/actions/CreateAction.php, a POST parameter obtained via (trim-only sanitization) is passed to with no restriction, reachable by any member with write access to comments (the default setting in plugins/comments/comments.setup.php).

Affected products

• Cotonti Cotonti: any version

Published 2026-08-05. Last modified 2026-08-26.