Ech0 authenticated user-list exposed data via public `/api/allusers` endpoint_CVE-2026-33638

{
    "lastseen": "",
    "description": "Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to version 4.2.0, `GET /api/allusers` is mounted as a public endpoint and returns user records without authentication. This allows remote unauthenticated user enumeration and exposure of user profile metadata. A fix is available in v4.2.0.",
    "published": "2026-03-26T20:52:40.464Z",
    "modified": "2026-03-27T20:19:07.459Z",
    "type": "cve",
    "title": "Ech0 authenticated user-list exposed data via public `/api/allusers` endpoint",
    "source": "GitHub_M",
    "references": "https://github.com/lin-snow/Ech0/security/advisories/GHSA-m983-7426-5hrj\nhttps://github.com/lin-snow/Ech0/commit/acbf1fd71011e6b9e1e6a911128056a19862f681\nhttps://github.com/lin-snow/Ech0/releases/tag/v4.2.0",
    "id": "CVE-2026-33638",
    "bulletinFamily": "",
    "cwe": [
        "CWE-862"
    ],
    "cvelist": null,
    "sourceData": "lin-snow Ech0 < 4.2.0",
    "sourceHref": "",
    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Ech0",
    "version": "< 4.2.0",
    "vendor": "lin-snow",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}