MuseBot before 2.0.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge admin sessions by using the hard-coded default session_key 'muse_bot_session_key'. Attackers can sign a MuseBot-session cookie carrying a user_id to gain full administrative access, reading password hashes, chat records, and bot configuration, and stopping bots.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/yincongcyincong/MuseBot/commit/3e64518948fe7037058f07ef987d35216c3f0cae patch
- https://github.com/yincongcyincong/MuseBot/commit/139f6158b50283b983d76976f593a3a09a064681 patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 9.3 · yincongcyincongNVD modified 2026-10-30 14:16
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 8
- https://github.com/yincongcyincong/MuseBot/issues/61 issue-tracking
- https://github.com/yincongcyincong/MuseBot/commit/3e64518948fe7037058f07ef987d35216c3f0cae patch
- https://github.com/yincongcyincong/MuseBot/commit/139f6158b50283b983d76976f593a3a09a064681 patch
- https://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/conf/conf.go#L28 technical-description
- https://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/controller/login.go#L19-L88 technical-description
- https://hackmd.io/@hieuPenguinnn/musebot-admin-default-session-key-auth-bypass third-party-advisory
- https://github.com/yincongcyincong/MuseBot product
- https://www.vulncheck.com/advisories/musebot-before-2.0.0-authentication-bypass-via-hard-coded-session-key third-party-advisory