{"id":"CVE-2021-21673","aliases":["GHSA-2vvr-5757-qp87"],"url":"https://o3.security/vulnerability/CVE-2021-21673","summary":"Open redirect vulnerability in Jenkins CAS Plugin","details":"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.","published":"2021-06-30T17:15:09.160Z","modified":"2026-07-08T21:25:44.968881Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.jenkins-ci.plugins:cas-plugin","fixedVersion":"1.6.1"}],"fix":null,"references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/06/30/1"},{"type":"ADVISORY","url":"https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-2387"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T21:25:44.968881Z"}}