CVE-2026-118691
CVE-2026-118691 · xianyu-auto-reply-fix through 2.0.7 Unauthenticated Message Sending via /send-message
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 6.3 · Medium · EPSS 0.3%
- Published
- Updated
Affected products and versions
xianyu-auto-reply-fix
- Versions
- ≥ 0, ≤ 2.0.7: Affected (semver)
No fix published
Original sources
- https://github.com/GuDong2003/xianyu-auto-reply-fix/issues/116
- https://github.com/GuDong2003/xianyu-auto-reply-fix
- https://github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/reply_server.py#L2347-L2475
- https://github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/db_manager.py#L1011
- https://github.com/GuDong2003/xianyu-auto-reply-fix/commit/999cfe61c401322d9893eb81ad1a76beabba6cfb
- https://www.vulncheck.com/advisories/xianyu-auto-reply-fix-through-2.0.7-unauthenticated-message-sending-via-send-message
- https://nvd.nist.gov/vuln/detail/CVE-2026-118691