{"id":"CVE-2021-21699","aliases":["GHSA-rp4x-h577-chvq"],"url":"https://o3.security/vulnerability/CVE-2021-21699","summary":"Stored XSS vulnerability in Jenkins Active Choices Plugin","details":"Jenkins Active Choices Plugin 2.5.6 and earlier does not escape the parameter name of reactive parameters and dynamic reference parameters.\n\nThis results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.\n\nJenkins Active Choices Plugin 2.5.7 escapes references to parameter names.","published":"2021-11-12T11:15:08.007Z","modified":"2026-07-08T22:15:01.584933Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},"epss":{"score":0.88476,"percentile":0.99758,"asOf":"2026-08-25"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.biouno:uno-choice","fixedVersion":"2.5.7"}],"fix":{"url":"https://github.com/jenkinsci/active-choices-plugin/commit/4529ab6413d4ec70d02455536ea6c5196332ba62","label":"jenkinsci/active-choices-plugin@4529ab6"},"references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/11/12/1"},{"type":"ADVISORY","url":"https://www.jenkins.io/security/advisory/2021-11-12/#SECURITY-2219"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21699"},{"type":"WEB","url":"https://github.com/jenkinsci/active-choices-plugin/commit/4529ab6413d4ec70d02455536ea6c5196332ba62"},{"type":"PACKAGE","url":"https://github.com/jenkinsci/active-choices-plugin"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T22:15:01.584933Z"}}