{"id":"CVE-2026-33638","state":"PUBLISHED","title":"Ech0 authenticated user-list exposed data via public `/api/allusers` endpoint","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.","publishedAt":"2026-03-26T20:52:40.464Z","updatedAt":"2026-03-27T20:19:07.459Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["lin-snow Ech0"],"affected":[{"vendor":"lin-snow","product":"Ech0","versions":[{"version":"< 4.2.0","status":"affected"}]}],"references":["https://github.com/lin-snow/Ech0/security/advisories/GHSA-m983-7426-5hrj","https://github.com/lin-snow/Ech0/commit/acbf1fd71011e6b9e1e6a911128056a19862f681","https://github.com/lin-snow/Ech0/releases/tag/v4.2.0"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/33xxx/CVE-2026-33638.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33638","state":"PUBLISHED","datePublished":"2026-03-26T20:52:40.464Z","dateUpdated":"2026-03-27T20:19:07.459Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-23T14:24:11.619Z"},"containers":{"cna":{"title":"Ech0 authenticated user-list exposed data via public `/api/allusers` endpoint","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"lin-snow","product":"Ech0","versions":[{"version":"< 4.2.0","status":"affected"}]}],"references":[{"url":"https://github.com/lin-snow/Ech0/security/advisories/GHSA-m983-7426-5hrj","name":"https://github.com/lin-snow/Ech0/security/advisories/GHSA-m983-7426-5hrj","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/lin-snow/Ech0/commit/acbf1fd71011e6b9e1e6a911128056a19862f681","name":"https://github.com/lin-snow/Ech0/commit/acbf1fd71011e6b9e1e6a911128056a19862f681","tags":["x_refsource_MISC"]},{"url":"https://github.com/lin-snow/Ech0/releases/tag/v4.2.0","name":"https://github.com/lin-snow/Ech0/releases/tag/v4.2.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-03-26T20:52:40.464Z"},"source":{"advisory":"GHSA-m983-7426-5hrj","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-27T20:18:24.196051Z","id":"CVE-2026-33638","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-27T20:19:07.459Z"}}]}}}