CVE-2026-118691
xianyu-auto-reply-fix through 2.0.7 Unauthenticated Message Sending via /send-message
CVSS Score
3.7
EPSS Score
0.0%
EPSS Percentile
0th
xianyu-auto-reply-fix through 2.0.7 contains a missing authorization vulnerability in the POST /send-message endpoint that allows unauthenticated attackers to send messages from other users' accounts using publicly known default API secrets. Attackers can supply the hard-coded api_key and another user's cookie_id, plus chosen chat_id, to_user_id and message values, to send arbitrary Xianyu messages to buyers from that merchant account.
| CWE | CWE-1188 |
| Vendor | gudong2003 |
| Product | xianyu-auto-reply-fix |
| Published | Oct 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
GuDong2003 / xianyu-auto-reply-fix
0 ≤ 2.0.7
References
github.com: https://github.com/GuDong2003/xianyu-auto-reply-fix/issues/116 github.com: https://github.com/GuDong2003/xianyu-auto-reply-fix github.com: https://github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/reply_server.py#L2347-L2475 github.com: https://github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/db_manager.py#L1011 github.com: https://github.com/GuDong2003/xianyu-auto-reply-fix/commit/999cfe61c401322d9893eb81ad1a76beabba6cfb vulncheck.com: https://www.vulncheck.com/advisories/xianyu-auto-reply-fix-through-2.0.7-unauthenticated-message-sending-via-send-message
Credits
hieuPenguinnn