{"id":"CVE-2026-66399","state":"PUBLISHED","title":"phpMyFAQ before 4.1.6 Privilege Escalation via Group Membership","description":"phpMyFAQ before 4.1.6 contains a privilege escalation vulnerability in GroupController::updateMembers() that allows administrators with only group-management permissions to join privileged groups without verification of required rights. Attackers can add themselves to pre-existing groups holding user-management rights and immediately inherit those permissions to modify or delete user accounts.","publishedAt":"2026-07-27T15:43:48.767Z","updatedAt":"2026-08-18T11:18:01.441Z","severity":{"score":8.5,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["thorsten phpMyFAQ"],"affected":[{"vendor":"thorsten","product":"phpMyFAQ","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.1.6","versionType":"semver"},{"version":"4.1.6","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-28cc-v39j-vr95","https://www.vulncheck.com/advisories/phpmyfaq-before-privilege-escalation-via-group-membership"],"weaknesses":["CWE-269"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/66xxx/CVE-2026-66399.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-66399","state":"PUBLISHED","datePublished":"2026-07-27T15:43:48.767Z","dateUpdated":"2026-08-18T11:18:01.441Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-07-26T12:22:34.139Z"},"containers":{"cna":{"title":"phpMyFAQ before 4.1.6 Privilege Escalation via Group Membership","descriptions":[{"lang":"en","value":"phpMyFAQ before 4.1.6 contains a privilege escalation vulnerability in GroupController::updateMembers() that allows administrators with only group-management permissions to join privileged groups without verification of required rights. Attackers can add themselves to pre-existing groups holding user-management rights and immediately inherit those permissions to modify or delete user accounts."}],"affected":[{"vendor":"thorsten","product":"phpMyFAQ","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.1.6","versionType":"semver"},{"version":"4.1.6","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-28cc-v39j-vr95","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-28cc-v39j-vr95)"},{"url":"https://www.vulncheck.com/advisories/phpmyfaq-before-privilege-escalation-via-group-membership","name":"VulnCheck Advisory: phpMyFAQ before 4.1.6 Privilege Escalation via Group Membership","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"HIGH","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.5,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-269","lang":"en","description":"Improper Privilege Management","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-08-18T11:18:01.441Z"},"datePublic":"2026-07-13T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:phpmyfaq:phpmyfaq:*:*:*:*:*:*:*:*","versionEndExcluding":"4.1.6"}]}]}],"credits":[{"lang":"en","value":"George Chen","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-28cc-v39j-vr95","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-28T14:51:28.427364Z","id":"CVE-2026-66399","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-28T14:54:36.075Z"}}]}}}