{"id":"CVE-2021-21686","aliases":["BIT-jenkins-2021-21686","GHSA-4g38-hrm4-rg94"],"url":"https://o3.security/vulnerability/CVE-2021-21686","summary":"Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins","details":"File path filters in the agent-to-controller security subsystem of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories.","published":"2021-11-04T17:15:08.277Z","modified":"2026-07-08T22:15:01.886071Z","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.jenkins-ci.main:jenkins-core","fixedVersion":"2.303.3"},{"ecosystem":"Maven","name":"org.jenkins-ci.main:jenkins-core","fixedVersion":"2.319"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T22:15:01.886071Z"}}