{"id":"CVE-2026-56721","revision":"699b8e0ea2ba4f7794d5e04b796cb73c","records":[{"revision":"699b8e0ea2ba4f7794d5e04b796cb73c","observedAt":"2026-10-26T17:35:31.029+00:00","statement":{"source":"cve-program","id":"CVE-2026-56721","aliases":[],"title":"CamaleonCMS 2.9.2 Privilege Escalation via Parameter Confusion in UsersController","description":"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.","state":0,"publishedAt":"2026-08-11T15:48:59.409+00:00","modifiedAt":"2026-10-26T16:47:54.211+00:00","affected":[{"ecosystem":"Vendor product","name":"CamaleonCMS","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"affected\",\n                    \"vendor\": \"owen2345\",\n                    \"product\": \"CamaleonCMS\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"2.9.2\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.7,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://github.com/owen2345/camaleon-cms","https://github.com/owen2345/camaleon-cms/pull/1185","https://github.com/owen2345/camaleon-cms/commit/26345034523a505cb01615509b7f0a665e89ae3e","https://www.vulncheck.com/advisories/camaleoncms-privilege-escalation-via-parameter-confusion-in-userscontroller"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-56721","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-56721","identifiers":["CVE-2026-56721"]},"retained":false,"historicalAffected":[]}],"coverage":[]}