{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-09T05:18:45.295","vulnerabilities":[{"cve":{"id":"CVE-2021-39177","sourceIdentifier":"security-advisories@github.com","published":"2021-08-30T23:15:07.070","lastModified":"2024-11-21T06:18:48.060","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Geyser is a bridge between Minecraft: Bedrock Edition and Minecraft: Java Edition. Versions of Geyser prior to 1.4.2-SNAPSHOT allow anyone that can connect to the server to forge a LoginPacket with manipulated JWT token allowing impersonation as any user. Version 1.4.2-SNAPSHOT contains a patch for the issue. There are no known workarounds aside from upgrading."},{"lang":"es","value":"Geyser es un puente entre Minecraft: Bedrock Edition y Minecraft: Java Edition. Unas versiones de Geyser anteriores a 1.4.2-SNAPSHOT permiten a cualquiera que pueda conectarse al servidor falsificar un LoginPacket con un token JWT manipulado, permitiendo una suplantación de identidad como cualquier usuario. La versión 1.4.2-SNAPSHOT contiene un parche para este problema. No se presentan soluciones conocidas aparte de la actualización"}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":7.4,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":2.2,"impactScore":5.2},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","baseScore":7.5,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"HIGH","exploitabilityScore":10.0,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-287"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:geysermc:geyser:*:*:*:*:*:*:*:*","versionEndExcluding":"1.4.2","matchCriteriaId":"515038BF-D294-47CE-B315-48E1C3CA2C13"}]}]}],"references":[{"url":"https://github.com/GeyserMC/Geyser/commit/b9541505af68ac7b7c093206ac7b1ba88957a5a6","source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/GeyserMC/Geyser/security/advisories/GHSA-h77f-xxx7-4858","source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"]},{"url":"https://updates.playhive.com/weekend-maintenance-disclosure-2kJMaY","source":"security-advisories@github.com","tags":["Third Party Advisory"]},{"url":"https://github.com/GeyserMC/Geyser/commit/b9541505af68ac7b7c093206ac7b1ba88957a5a6","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/GeyserMC/Geyser/security/advisories/GHSA-h77f-xxx7-4858","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://updates.playhive.com/weekend-maintenance-disclosure-2kJMaY","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]}]}}]}