CVE-2020-26891

{"id": "CVE-2020-26891", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 4.3, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "NONE", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.8}]}, "published": "2020-10-19T17:15:13.220", "references": [{"url": "https://github.com/matrix-org/synapse/pull/8444", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/matrix-org/synapse/releases/tag/v1.21.2", "tags": ["Release Notes", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-3x8c-fmpc-5rmq", "tags": ["Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://matrix.org/blog/2020/10/15/synapse-1-21-2-released-and-security-advisory", "tags": ["Release Notes", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/matrix-org/synapse/pull/8444", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/matrix-org/synapse/releases/tag/v1.21.2", "tags": ["Release Notes", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-3x8c-fmpc-5rmq", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://matrix.org/blog/2020/10/15/synapse-1-21-2-released-and-security-advisory", "tags": ["Release Notes", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "AuthRestServlet in Matrix Synapse before 1.21.0 is vulnerable to XSS due to unsafe interpolation of the session GET parameter. This allows a remote attacker to execute an XSS attack on the domain Synapse is hosted on, by supplying the victim user with a malicious URL to the /_matrix/client/r0/auth/*/fallback/web or /_matrix/client/unstable/auth/*/fallback/web Synapse endpoints."}, {"lang": "es", "value": "AuthRestServlet en Matrix Synapse versiones anteriores a 1.21.0 es vulnerable a XSS debido a la interpolaci\u00f3n insegura del par\u00e1metro GET de la sesi\u00f3n. Esto permite a un atacante remoto ejecutar un ataque XSS en el dominio en el que est\u00e1 alojado Synapse, suministrando al usuario v\u00edctima una URL maliciosa a los puntos finales de /_matrix/cliente/r0/auth/*/fallback/web o /_matrix/cliente/instable/auth/*/fallback/web Synapse"}], "lastModified": "2024-11-21T05:20:25.413", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "39E3BC16-D440-463F-BC7B-B640865B60B4", "versionEndExcluding": "1.21.0"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}