{"cve":"CVE-2021-21684","nvd":{"published":"2021-10-06T23:15:06.977","modified":"2026-06-17T03:35:59.590","status":"Modified","description":"Jenkins Git Plugin 4.8.2 and earlier does not escape the Git SHA-1 checksum parameters provided to commit notifications when displaying them in a build cause, resulting in a stored cross-site scripting (XSS) vulnerability.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-116"],"references":["http://www.openwall.com/lists/oss-security/2021/10/06/1","https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2499","http://www.openwall.com/lists/oss-security/2021/10/06/1","https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2499"],"products":["jenkins:git"],"source":"nvd","synced_at":"2026-10-19T21:23:41.316049955+00:00"},"epss":{"cve":"CVE-2021-21684","score":0.01242,"percentile":0.69221,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-gghc-g8cj-4vfv","url":"https://osv.dev/vulnerability/GHSA-gghc-g8cj-4vfv","summary":"Stored XSS vulnerability in Jenkins Git Plugin","modified":"2024-02-16T08:22:11.873258Z","packages":[{"ecosystem":"Maven","name":"org.jenkins-ci.plugins:git","purl":"pkg:maven/org.jenkins-ci.plugins/git","ranges":["<4.8.3"],"fixed":["4.8.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}