CVE-2021-3127

{"id": "CVE-2021-3127", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"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:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2021-03-16T20:15:13.300", "references": [{"url": "https://advisories.nats.io/CVE/CVE-2021-3127.txt", "tags": ["Exploit", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://advisories.nats.io/CVE/CVE-2021-3127.txt", "tags": ["Exploit", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-755"}]}], "descriptions": [{"lang": "en", "value": "NATS Server 2.x before 2.2.0 and JWT library before 2.0.1 have Incorrect Access Control because Import Token bindings are mishandled."}, {"lang": "es", "value": "NATS Server versiones 2.x anteriores a 2.2.0 y la biblioteca JWT versiones anteriores a 2.0.1, presentan un Control de Acceso Incorrecto porque unos enlaces de token de importaci\u00f3n se manejan inapropiadamente"}], "lastModified": "2026-03-30T14:30:00.877", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A6A674D0-36A2-4AF7-A37E-AE127E53D2E1", "versionEndExcluding": "2.2.0", "versionStartIncluding": "2.0.0"}, {"criteria": "cpe:2.3:a:nats:jwt_library:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "993D5140-11FE-46D0-8886-D0FACD33AF27", "versionEndExcluding": "2.0.1"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}