| 제목 | FOSSBilling <= 0.8.6 Authentication Bypass Issues |
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| 설명 | The unauthenticated guest signup endpoint (POST /api/guest/client/create) discloses whether a given email address already belongs to a registered client. Guest::create() throws the error "This email address is already registered." when Client\Service::clientAlreadyExists() finds a matching row, and returns a new client ID otherwise. Because the API layer passes exception messages straight through to the JSON response with no redaction, this is a clean existence oracle for any FOSSBilling deployment's customer email list. |
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| 원천 | ⚠️ https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-x4mh-g4pc-wfc5 |
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| 사용자 | mikannse (UID 100854) |
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| 제출 | 2026. 10. 08. AM 03:52 (14 날 ago) |
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| 모더레이션 | 2026. 10. 21. PM 12:48 (13 days later) |
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| 상태 | 중복 |
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| VulDB 항목 | 422428 [FOSSBilling 까지 0.8.6 Guest API /api/guest/client/create 정보 공개] |
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| 포인트들 | 0 |
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