CVE-2026-56721 — CamaleonCMS 2.9.2 Privilege Escalation via Parameter Confusion in UsersController
CamaleonCMS version 2.9.2 and earlier contains a privilege escalation vulnerability via insecure direct object reference (IDOR) that allows authenticated low-privileged attacker…
Published: 2026-08-11 · CVSS: 8.7 · CVSS 4.0
CamaleonCMS version 2.9.2 and earlier contains a privilege escalation vulnerability via insecure direct object reference (IDOR) that allows authenticated low-privileged attackers to overwrite any user's credentials by exploiting a parameter confusion flaw between the authorization filter and action body in the UsersController. Attackers can send a PATCH request to the updated_ajax endpoint setting params[:id] to their own user ID to pass the self-authorization check while simultaneously setting params[:user_id] to a victim's ID, causing the controller to load and mutate the victim's account, including overwriting administrator passwords to achieve full site takeover.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7