{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-09-30T23:50:21.508","vulnerabilities":[{"cve":{"id":"CVE-2023-32683","sourceIdentifier":"security-advisories@github.com","published":"2023-06-06T19:15:11.963","lastModified":"2026-06-17T05:59:22.977","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. A discovered oEmbed or image URL can bypass the `url_preview_url_blacklist` setting potentially allowing server side request forgery or bypassing network policies. Impact is limited to IP addresses allowed by the `url_preview_ip_range_blacklist` setting (by default this only allows public IPs) and by the limited information returned to the client: 1. For discovered oEmbed URLs, any non-JSON response or a JSON response which includes non-oEmbed information is discarded. 2. For discovered image URLs, any non-image response is discarded. Systems which have URL preview disabled (via the `url_preview_enabled` setting) or have not configured a `url_preview_url_blacklist` are not affected. This issue has been addressed in version 1.85.0. Users are advised to upgrade. User unable to upgrade may also disable URL previews."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"matrix-org","product":"synapse","versions":[{"version":"< 1.85.0","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","baseScore":3.5,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.1,"impactScore":1.4},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","baseScore":5.4,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":2.5}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2025-01-07T16:25:39.026761Z","id":"CVE-2023-32683","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-863"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-918"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*","versionEndExcluding":"1.85.0","matchCriteriaId":"57D26682-77B5-428E-B7F8-50A0D2CB3C2E"}]}]}],"references":[{"url":"https://github.com/matrix-org/synapse/pull/15601","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/matrix-org/synapse/security/advisories/GHSA-98px-6486-j7qc","source":"security-advisories@github.com","tags":["Mitigation","Patch","Vendor Advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2/","source":"security-advisories@github.com"},{"url":"https://github.com/matrix-org/synapse/pull/15601","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://github.com/matrix-org/synapse/security/advisories/GHSA-98px-6486-j7qc","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mitigation","Patch","Vendor Advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2/","source":"af854a3a-2127-422b-91ae-364da2661108"}]}}]}