CVE-2021-3127

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*", "matchCriteriaId": "A6A674D0-36A2-4AF7-A37E-AE127E53D2E1", "versionEndExcluding": "2.2.0", "versionStartIncluding": "2.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:nats:jwt_library:*:*:*:*:*:*:*:*", "matchCriteriaId": "993D5140-11FE-46D0-8886-D0FACD33AF27", "versionEndExcluding": "2.0.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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"}], "id": "CVE-2021-3127", "lastModified": "2026-06-17T04:04:42.737", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-03-16T20:15:13.300", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Vendor Advisory"], "url": "https://advisories.nats.io/CVE/CVE-2021-3127.txt"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Vendor Advisory"], "url": "https://advisories.nats.io/CVE/CVE-2021-3127.txt"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-755"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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