{"affected":[{"affectedData":[{"product":"Jenkins","vendor":"Jenkins project","versions":[{"lessThan":"unspecified","status":"affected","version":"2.242","versionType":"custom"},{"lessThanOrEqual":"2.274","status":"affected","version":"unspecified","versionType":"custom"},{"lessThanOrEqual":"LTS 2.263.1","status":"affected","version":"unspecified","versionType":"custom"}]}],"source":"jenkinsci-cert@googlegroups.com"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*","matchCriteriaId":"1D0A8DA2-6151-430D-9FC2-1332E25B4E3B","versionEndIncluding":"2.263.1","vulnerable":true},{"criteria":"cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*","matchCriteriaId":"9A6F1AB1-BFB3-448F-BDAC-2A3487CBFEB6","versionEndIncluding":"2.274","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"Jenkins 2.274 and earlier, LTS 2.263.1 and earlier improperly validates the format of a provided fingerprint ID when checking for its existence allowing an attacker to check for the existence of XML files with a short path."},{"lang":"es","value":"Jenkins versiones 2.274 y anteriores, LTS versiones 2.263.1 y anteriores, comprueban inapropiadamente el formato de una identificación de huella digital proporcionada al comprobar su existencia, permitiendo a un atacante comprobar la existencia de archivos XML con una ruta corta."}],"id":"CVE-2021-21606","lastModified":"2026-06-17T03:35:51.760","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"MEDIUM","cvssData":{"accessComplexity":"LOW","accessVector":"NETWORK","authentication":"SINGLE","availabilityImpact":"NONE","baseScore":4.0,"confidentialityImpact":"PARTIAL","integrityImpact":"NONE","vectorString":"AV:N/AC:L/Au:S/C:P/I:N/A:N","version":"2.0"},"exploitabilityScore":8.0,"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":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"exploitabilityScore":2.8,"impactScore":1.4,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2021-01-13T16:15:13.663","references":[{"source":"jenkinsci-cert@googlegroups.com","tags":["Vendor Advisory"],"url":"https://www.jenkins.io/security/advisory/2021-01-13/#SECURITY-2023"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"],"url":"https://www.jenkins.io/security/advisory/2021-01-13/#SECURITY-2023"}],"sourceIdentifier":"jenkinsci-cert@googlegroups.com","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-20"}],"source":"nvd@nist.gov","type":"Primary"}]}