{"id":"CVE-2026-111633","published":"2026-10-16T18:17:43.607","lastModified":"2026-10-16T19:04:35.840","description":"ZKEACMS through 4.4 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge REST API JWT bearer tokens using a hard-coded HMAC-SHA256 signing key in JwtBearerDefaults.cs. Attackers can sign a token with the Name claim set to 'admin' to call ApiAuthorize endpoints, modifying articles and products and reading form submissions.","cvssScore":8.6,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","cwes":["CWE-321"],"vendors":[],"products":[],"references":[{"url":"https://github.com/SeriaWei/ZKEACMS/blob/v4.4/src/ZKEACMS/Api/JwtBearerDefaults.cs#L14-L19","tags":[]},{"url":"https://github.com/SeriaWei/ZKEACMS/blob/v4.4/src/ZKEACMS/BuilderAuthentication.cs#L41-L52","tags":[]},{"url":"https://github.com/SeriaWei/ZKEACMS/issues/531","tags":[]},{"url":"https://hackmd.io/@hieuPenguinnn/zkeacms-hardcoded-jwt-signing-key-admin-auth-bypass","tags":[]},{"url":"https://www.vulncheck.com/advisories/zkeacms-through-4.4-authentication-bypass-via-hard-coded-jwt-signing-key","tags":[]}],"exploitRefs":[{"url":"https://github.com/SeriaWei/ZKEACMS/blob/v4.4/src/ZKEACMS/Api/JwtBearerDefaults.cs#L14-L19","tags":[]},{"url":"https://github.com/SeriaWei/ZKEACMS/blob/v4.4/src/ZKEACMS/BuilderAuthentication.cs#L41-L52","tags":[]},{"url":"https://github.com/SeriaWei/ZKEACMS/issues/531","tags":[]}],"hasPoc":true,"ai":null}