Vulnerability Description
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.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/GuDong2003/xianyu-auto-reply-fix
- https://github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/db_manager.py#L1
- https://github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/reply_server.py#
- https://github.com/GuDong2003/xianyu-auto-reply-fix/commit/999cfe61c401322d9893e
- https://github.com/GuDong2003/xianyu-auto-reply-fix/issues/116
- https://www.vulncheck.com/advisories/xianyu-auto-reply-fix-through-2.0.7-unauthe
FAQ
What is CVE-2026-118691?
CVE-2026-118691 is a vulnerability with a CVSS score of 3.7 (LOW). 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 ...
How severe is CVE-2026-118691?
CVE-2026-118691 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-118691?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.