CVE-2026-118691mediumCWE-1188

CVE-2026-118691: medium-severity vulnerability in GuDong2003 xianyu-auto-reply-fix

xianyu-auto-reply-fix through 2.0.7 Unauthenticated Message Sending via /send-message

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33Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 6.3epss 0.3%
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:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Affected products
GuDong2003 · xianyu-auto-reply-fix
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