| 제목 | Zhongbang CRMEB v5.6.3 Authentication Bypass by |
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| 설명 | 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. |
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| 원천 | ⚠️ https://github.com/foeCat/CVE/blob/main/CRMEB/jwt_auth_bypass/remote_register_jwt_bypass.md |
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| 사용자 | Ho Cherry (UID 94105) |
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| 제출 | 2026. 01. 09. PM 03:53 (5 개월 ago) |
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| 모더레이션 | 2026. 01. 19. PM 04:28 (10 days later) |
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| 상태 | 수락 |
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| VulDB 항목 | 341789 [CRMEB 까지 5.6.3 JSON Token LoginServices.php remoteRegister uid 약한 인증] |
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| 포인트들 | 20 |
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