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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.4.0]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "CouchCMS", "source": "cna", "vendor": "CouchCMS"}, "product": "couchcms", "vendor": "couchcms"}], "analysis": {"en": {"generated_at": "2026-04-10T16:21:59.933501+00:00", "value": {"mitigation_remediation": ["Upgrade CouchCMS to the latest version released by the vendor.", "Verify that all user creation forms validate the f_k_levels_list parameter and that it cannot be manipulated by external input.", "Audit existing SuperAdmin and Admin accounts for unauthorized creation or privilege changes and enforce strict access controls."], "summary": {"action": "Immediate Patch", "impact": "Privilege Escalation to SuperAdmin"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the CouchCMS content management system. Specific affected releases were not enumerated in the available data. Users should review the site\u2019s current CouchCMS version against the vendor\u2019s advisories.", "description_and_impact": "CouchCMS contains a flaw that allows an authenticated Admin-level user to spoof the f_k_levels_list parameter during user sign\u2011up or edit. By changing the value from 4 to 10 in the HTTP request body, the user bypasses the application\u2019s authorization check and is granted SuperAdmin privileges. This gives the attacker full control over the site, including modifying content, configuration, and other user accounts.", "risk_and_exploitability": "The flaw carries a CVSS score of 8.6, indicating a high severity. No EPSS data or KEV listing is available. The attack requires an authenticated session with Admin level; once the parameter is tampered, the escalation is immediate and no additional privilege is needed. Because the vector relies on a known, authenticated account, the exploitation window is limited to environments where Admin access is available to potential attackers."}}}}, "created": "2026-04-13T12:44:50.955397+00:00", "updated": "2026-04-13T13:01:22.412965+00:00", "vendors": ["couchcms", "couchcms$PRODUCT$couchcms"]}