CVE-2026-33638

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.2.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "Ech0", "source": "cna", "vendor": "lin-snow"}, "product": "ech0", "vendor": "lin-snow"}], "analysis": {"en": {"generated_at": "2026-04-01T06:17:18.598060+00:00", "value": {"mitigation_remediation": ["Apply Ech0 update to v4.2.0 or later", "Restrict GET /api/allusers to authenticated users if patch cannot be applied", "Verify deployed version and audit configuration", "Monitor access logs for enumeration patterns"], "summary": {"action": "Immediate Patch", "impact": "Unauthenticated user enumeration exposing personal data"}, "threat_synthesis": {"affected_systems": "The Ech0 open\u2011source publishing platform, versions prior to v4.2.0, is affected; the vulnerable product is Ech0, hosted by lin\u2011snow, and any deployment running an unpatched instance of Ech0 before the v4.2.0 release can be impacted.", "description_and_impact": "An unauthenticated GET request to the public /api/allusers endpoint returns full user records, exposing personal profile details such as usernames and metadata; the flaw is a missing authentication check (CWE-862) that allows remote users to enumerate accounts without credentials, potentially enabling social engineering or identity theft but does not provide code execution or data modification rights.", "risk_and_exploitability": "The vulnerability has a CVSS base score of 5.3 indicating moderate severity; the EPSS score is below 1% suggesting low likelihood of exploitation, and it is not present in the CISA KEV catalog; the attack vector is remote over HTTP/HTTPS, requiring no local privileges, and exploitation yields exposure of all user records but no alteration or code execution capabilities."}}}}, "created": "2026-03-27T08:31:54.999216+00:00", "updated": "2026-04-02T07:56:19.443585+00:00", "vendors": ["lin-snow", "lin-snow$PRODUCT$ech0"]}