{"api_version":"1","generated_at":"2026-07-24T20:16:28+00:00","cve":"CVE-2021-21673","urls":{"html":"https://cve.report/CVE-2021-21673","api":"https://cve.report/api/cve/CVE-2021-21673.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-21673","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-21673"},"summary":{"title":"CVE-2021-21673","description":"Jenkins CAS Plugin 1.6.0 and earlier improperly determines that a redirect URL after login is legitimately pointing to Jenkins, allowing attackers to perform phishing attacks.","state":"PUBLIC","assigner":"jenkinsci-cert@googlegroups.com","published_at":"2021-06-30 17:15:00","updated_at":"2023-10-25 18:16:00"},"problem_types":[],"metrics":[],"references":[{"url":"http://www.openwall.com/lists/oss-security/2021/06/30/1","name":"[oss-security] 20210630 Multiple vulnerabilities in Jenkins and Jenkins plugins","refsource":"MLIST","tags":[],"title":"oss-security - Multiple vulnerabilities in Jenkins and Jenkins plugins","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-2387","name":"https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-2387","refsource":"CONFIRM","tags":[],"title":"Jenkins Security Advisory 2021-06-30","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-21673","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21673","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"21673","vulnerable":"1","versionEndIncluding":"1.6.0","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"jenkins","cpe5":"cas","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"jenkins","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_version":"4.0","data_type":"CVE","data_format":"MITRE","CVE_data_meta":{"ID":"CVE-2021-21673","ASSIGNER":"jenkinsci-cert@googlegroups.com","STATE":"PUBLIC"},"description":{"description_data":[{"lang":"eng","value":"Jenkins CAS Plugin 1.6.0 and earlier improperly determines that a redirect URL after login is legitimately pointing to Jenkins, allowing attackers to perform phishing attacks."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"affects":{"vendor":{"vendor_data":[{"vendor_name":"Jenkins project","product":{"product_data":[{"product_name":"Jenkins CAS Plugin","version":{"version_data":[{"version_affected":"<=","version_name":"unspecified","version_value":"1.6.0"}]}}]}}]}},"references":{"reference_data":[{"url":"https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-2387","refsource":"MISC","name":"https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-2387"},{"url":"http://www.openwall.com/lists/oss-security/2021/06/30/1","refsource":"MISC","name":"http://www.openwall.com/lists/oss-security/2021/06/30/1"}]}},"nvd":{"publishedDate":"2021-06-30 17:15:00","lastModifiedDate":"2023-10-25 18:16:00","problem_types":[],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM"},"exploitabilityScore":2.8,"impactScore":2.7},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:P/I:P/A:N","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"NONE","baseScore":5.8},"severity":"MEDIUM","exploitabilityScore":8.6,"impactScore":4.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:jenkins:cas:*:*:*:*:*:jenkins:*:*","versionEndIncluding":"1.6.0","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"21673","Ordinal":"196361","Title":"CVE-2021-21673","CVE":"CVE-2021-21673","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"21673","Ordinal":"1","NoteData":"Jenkins CAS Plugin 1.6.0 and earlier improperly determines that a redirect URL after login is legitimately pointing to Jenkins, allowing attackers to perform phishing attacks.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"21673","Ordinal":"2","NoteData":"2021-06-30","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"21673","Ordinal":"3","NoteData":"2021-06-30","Type":"Other","Title":"Modified"}]}}}