{"id":"CVE-2026-56721","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-56721","summary":"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…","details":"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.","published":"2026-08-11T16:17:33.563","modified":"2026-08-11T16:17:33.563","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/owen2345/camaleon-cms/commit/26345034523a505cb01615509b7f0a665e89ae3e","label":"owen2345/camaleon-cms@2634503"},"references":[{"type":"WEB","url":"https://github.com/owen2345/camaleon-cms"},{"type":"WEB","url":"https://github.com/owen2345/camaleon-cms/commit/26345034523a505cb01615509b7f0a665e89ae3e"},{"type":"WEB","url":"https://github.com/owen2345/camaleon-cms/pull/1185"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/camaleoncms-privilege-escalation-via-parameter-confusion-in-userscontroller"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-11T16:17:33.563"}}