CVE-2025-30355

{"id": "CVE-2025-30355", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 4.2, "exploitabilityScore": 2.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2025-03-27T01:15:12.500", "references": [{"url": "https://github.com/element-hq/synapse/commit/2277df2a1eb685f85040ef98fa21d41aa4cdd389", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/element-hq/synapse/releases/tag/v1.127.1", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/element-hq/synapse/security/advisories/GHSA-v56r-hwv5-mxg6", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-20"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known workarounds are available."}, {"lang": "es", "value": "Synapse es una implementaci\u00f3n de c\u00f3digo abierto de un servidor dom\u00e9stico Matrix. Un servidor malicioso puede manipular eventos que, al recibirse, impiden que las versiones de Synapse hasta la 1.127.0 se federen con otros servidores. La vulnerabilidad se ha explotado in situ y se ha corregido en Synapse v1.127.1. No se conocen workarounds."}], "lastModified": "2025-08-26T19:24:45.283", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "14AB0CCC-9114-4556-91F4-6142BAC9D568", "versionEndExcluding": "1.127.1"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}