CVE-2026-55741: Cotonti

High severity, CVSS 8.8. EPSS: 0.2% chance of exploitation in the next 30 days.

Cotonti 1.0.0 (master branch, commit f43f1fc3) is vulnerable to Cross-Site Request Forgery in the administration configuration handler. In system/admin/admin.config.php, the configuration update action ('a=update') processes POST data via cot_config_update_options without calling cot_check_xg to validate the anti-CSRF token (the 'x' parameter), unlike other admin handlers (e.g. admin.structure.php, admin.cache.php).

Affected products

• Cotonti Cotonti: version 1.0.0 only

Published 2026-06-18. Last modified 2026-08-10.