{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-118691","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-10-28T17:31:29.498Z","datePublished":"2026-10-28T21:11:18.629Z","dateUpdated":"2026-10-28T21:11:18.629Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-10-28T21:11:18.629Z"},"datePublic":"2026-10-22T00:00:00.000Z","title":"xianyu-auto-reply-fix through 2.0.7 Unauthenticated Message Sending via /send-message","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Initialization of a Resource with an Insecure Default","cweId":"CWE-1188","type":"CWE"}]}],"affected":[{"vendor":"GuDong2003","product":"xianyu-auto-reply-fix","defaultStatus":"unaffected","versions":[{"version":"0","lessThanOrEqual":"2.0.7","status":"affected","versionType":"semver"}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.3,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW"}}],"references":[{"url":"https://github.com/GuDong2003/xianyu-auto-reply-fix/issues/116","tags":["issue-tracking"],"name":"GitHub Issue #116"},{"url":"https://github.com/GuDong2003/xianyu-auto-reply-fix","tags":["product"]},{"url":"https://github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/reply_server.py#L2347-L2475","tags":["technical-description"]},{"url":"https://github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/db_manager.py#L1011","tags":["technical-description"]},{"url":"https://github.com/GuDong2003/xianyu-auto-reply-fix/commit/999cfe61c401322d9893eb81ad1a76beabba6cfb","tags":["patch"]},{"name":"VulnCheck Advisory: xianyu-auto-reply-fix through 2.0.7 Unauthenticated Message Sending via /send-message","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/xianyu-auto-reply-fix-through-2.0.7-unauthenticated-message-sending-via-send-message"}],"credits":[{"lang":"en","value":"hieuPenguinnn","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}}}}