{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-09-30T23:52:31.099","vulnerabilities":[{"cve":{"id":"CVE-2023-43796","sourceIdentifier":"security-advisories@github.com","published":"2023-10-31T17:15:23.270","lastModified":"2026-06-17T06:26:27.760","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Synapse is an open-source Matrix homeserver Prior to versions 1.95.1 and 1.96.0rc1, cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver. System administrators are encouraged to upgrade to Synapse 1.95.1 or 1.96.0rc1 to receive a patch. As a workaround, the `federation_domain_whitelist` can be used to limit federation traffic with a homeserver."},{"lang":"es","value":"Synapse es un servidor doméstico Matrix de código abierto. Antes de las versiones 1.95.1 y 1.96.0rc1, la información del dispositivo almacenado en caché de usuarios remotos se puede consultar desde Synapse. Esto se puede utilizar para enumerar los usuarios remotos conocidos por un servidor doméstico. Se recomienda a los administradores del sistema que actualicen a Synapse 1.95.1 o 1.96.0rc1 para recibir un parche. Como workaround, se puede utilizar `federation_domain_whitelist` para limitar el tráfico de federación con un servidor doméstico."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"matrix-org","product":"synapse","versions":[{"version":"< 1.95.1","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-200"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"NVD-CWE-noinfo"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*","versionEndExcluding":"1.95.1","matchCriteriaId":"F205A9BF-C734-415C-A9D9-84E721A53C07"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*","matchCriteriaId":"CC559B26-5DFC-4B7A-A27C-B77DE755DFF9"},{"vulnerable":true,"criteria":"cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*","matchCriteriaId":"B8EDB836-4E6A-4B71-B9B2-AA3E03E0F646"}]}]}],"references":[{"url":"https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575","source":"security-advisories@github.com","tags":["Vendor Advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS/","source":"security-advisories@github.com","tags":["Mailing List"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY/","source":"security-advisories@github.com","tags":["Mailing List"]},{"url":"https://security.gentoo.org/glsa/202401-12","source":"security-advisories@github.com"},{"url":"https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List"]},{"url":"https://security.gentoo.org/glsa/202401-12","source":"af854a3a-2127-422b-91ae-364da2661108"}]}}]}