| Title | Zhongbang CRMEB v5.6.3 Authentication Bypass by |
|---|
| Description | The remote_register endpoint accepts base64-encoded JSON tokens without verifying JWT signatures. Attackers can forge arbitrary tokens to create unlimited fake accounts or login as any existing user by specifying any uid value.
The root cause is using JWT::urlsafeB64Decode() instead of JWT::decode(). The former only decodes base64 without cryptographic signature verification, while the latter properly validates JWT signatures. |
|---|
| Source | ⚠️ https://github.com/foeCat/CVE/blob/main/CRMEB/jwt_auth_bypass/remote_register_jwt_bypass.md |
|---|
| User | Ho Cherry (UID 94105) |
|---|
| Submission | 01/09/2026 15:53 (5 months ago) |
|---|
| Moderation | 01/19/2026 16:28 (10 days later) |
|---|
| Status | Accepted |
|---|
| VulDB entry | 341789 [CRMEB up to 5.6.3 JSON Token LoginServices.php remoteRegister uid improper authentication] |
|---|
| Points | 20 |
|---|