{"id":"CVE-2026-56721","title":"CamaleonCMS 2.9.2 Privilege Escalation via Parameter Confusion in UsersController","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 overwrite any user's credentials by exploiting a parame…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-639"],"vendor":"owen2345","product":"CamaleonCMS","affected":["CamaleonCMS <= 2.9.2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-08-11T17:44:18.998747Z"},"published":"2026-08-11","updated":"2026-10-26","sourceUpdated":"2026-10-26T16:47:54.211Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-56721","references":[{"url":"https://github.com/owen2345/camaleon-cms","label":"Product Repository"},{"url":"https://github.com/owen2345/camaleon-cms/pull/1185","label":"Pull Request"},{"url":"https://github.com/owen2345/camaleon-cms/commit/26345034523a505cb01615509b7f0a665e89ae3e","label":"Patch Commit"},{"url":"https://www.vulncheck.com/advisories/camaleoncms-privilege-escalation-via-parameter-confusion-in-userscontroller"}],"tags":["cve.org"],"epss":0.00523,"epssPercentile":0.44196,"ingestedAt":"2026-10-26T17:33:33.065Z","slug":"CVE-2026-56721","body":"## Overview\n\nCamaleonCMS 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.\n\n## Affected\n\n- `CamaleonCMS <= 2.9.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}