{"id":"CVE-2026-118691","published":"2026-10-28T22:17:13.217","lastModified":"2026-10-28T22:17:13.217","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.","cvssScore":3.7,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","cwes":["CWE-1188"],"vendors":[],"products":[],"references":[{"url":"https://github.com/GuDong2003/xianyu-auto-reply-fix","tags":[]},{"url":"https://github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/db_manager.py#L1011","tags":[]},{"url":"https://github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/reply_server.py#L2347-L2475","tags":[]},{"url":"https://github.com/GuDong2003/xianyu-auto-reply-fix/commit/999cfe61c401322d9893eb81ad1a76beabba6cfb","tags":[]},{"url":"https://github.com/GuDong2003/xianyu-auto-reply-fix/issues/116","tags":[]},{"url":"https://www.vulncheck.com/advisories/xianyu-auto-reply-fix-through-2.0.7-unauthenticated-message-sending-via-send-message","tags":[]}],"exploitRefs":[{"url":"https://github.com/GuDong2003/xianyu-auto-reply-fix","tags":[]},{"url":"https://github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/db_manager.py#L1011","tags":[]},{"url":"https://github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/reply_server.py#L2347-L2475","tags":[]},{"url":"https://github.com/GuDong2003/xianyu-auto-reply-fix/commit/999cfe61c401322d9893eb81ad1a76beabba6cfb","tags":[]},{"url":"https://github.com/GuDong2003/xianyu-auto-reply-fix/issues/116","tags":[]}],"hasPoc":true,"ai":null}