{"id":"CVE-2025-66296","state":"PUBLISHED","title":"Grav vulnerable to Privilege Escalation in Grav Admin: Missing Username Uniqueness Check Allows Admin Account Takeover","description":"Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a privilege escalation vulnerability exists in Grav’s Admin plugin due to the absence of username uniqueness validation when creating users. A user with the create user permission can create a new account using the same username as an existing administrator account, set a new password/email, and then log in as that administrator. This effectively allows privilege escalation from limited user-manager permissions to full administrator access. This vulnerability is fixed in 1.8.0-beta.27.","publishedAt":"2025-12-01T21:03:07.231Z","updatedAt":"2025-12-02T14:06:13.212Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["getgrav grav"],"affected":[{"vendor":"getgrav","product":"grav","versions":[{"version":"< 1.8.0-beta.27","status":"affected"}]}],"references":["https://github.com/getgrav/grav/security/advisories/GHSA-cjcp-qxvg-4rjm","https://github.com/getgrav/grav/commit/3462d94d575064601689b236508c316242e15741"],"weaknesses":["CWE-266"],"ingestedAt":"2026-10-29T20:09:56.034Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/66xxx/CVE-2025-66296.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-66296","state":"PUBLISHED","datePublished":"2025-12-01T21:03:07.231Z","dateUpdated":"2025-12-02T14:06:13.212Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-11-26T23:11:46.393Z"},"containers":{"cna":{"title":"Grav vulnerable to Privilege Escalation in Grav Admin: Missing Username Uniqueness Check Allows Admin Account Takeover","descriptions":[{"lang":"en","value":"Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a privilege escalation vulnerability exists in Grav’s Admin plugin due to the absence of username uniqueness validation when creating users. A user with the create user permission can create a new account using the same username as an existing administrator account, set a new password/email, and then log in as that administrator. This effectively allows privilege escalation from limited user-manager permissions to full administrator access. This vulnerability is fixed in 1.8.0-beta.27."}],"affected":[{"vendor":"getgrav","product":"grav","versions":[{"version":"< 1.8.0-beta.27","status":"affected"}]}],"references":[{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-cjcp-qxvg-4rjm","name":"https://github.com/getgrav/grav/security/advisories/GHSA-cjcp-qxvg-4rjm","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/getgrav/grav/commit/3462d94d575064601689b236508c316242e15741","name":"https://github.com/getgrav/grav/commit/3462d94d575064601689b236508c316242e15741","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-266","lang":"en","description":"CWE-266: Incorrect Privilege Assignment","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2025-12-01T21:03:07.231Z"},"source":{"advisory":"GHSA-cjcp-qxvg-4rjm","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-12-02T14:05:57.713950Z","id":"CVE-2025-66296","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":"2025-12-02T14:06:13.212Z"}}]}}}