CVE-2026-55742

13th percentile - higher than 13% of all known CVEs

Cotonti 1.0.0 (master branch, commit f43f1fc3) is vulnerable to Cross-Site Request Forgery in the administration rights handler. In system/admin/admin.rights.php, the rights update action ('a=update') modifies group access rights (including via cot_auth_add_group) without calling cot_check_xg to validate the anti-CSRF token.

An attacker can trick an administrator into performing unauthorized permission changes, potentially leading to privilege escalation or system integrity compromise.

Add anti-CSRF token validation to all actions that modify permissions. Also, implement CSRF protection mechanisms such as session-synchronized tokens.