{
    "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"
            }
        }
    }
}