{"id":"CVE-2021-21677","aliases":["GHSA-58pr-hprx-7hg6"],"url":"https://o3.security/vulnerability/CVE-2021-21677","summary":"RCE vulnerability in Jenkins Code Coverage API Plugin","details":"Jenkins Code Coverage API Plugin 1.4.0 and earlier does not apply [JEP-200 deserialization protection](https://github.com/jenkinsci/jep/tree/master/jep/200) to Java objects it deserializes from disk.\n\nThis results in a remote code execution (RCE) vulnerability exploitable by attackers able to control agent processes.\n\nJenkins Code Coverage API Plugin 1.4.1 configures its Java object deserialization to only deserialize safe types.","published":"2021-08-31T14:15:25.447Z","modified":"2026-07-09T00:12:28.173789Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.02213,"percentile":0.81779,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"io.jenkins.plugins:code-coverage-api","fixedVersion":"1.4.1"}],"fix":{"url":"https://github.com/jenkinsci/code-coverage-api-plugin/commit/a5b3c18cff2a0b494c55fa73b05fc935b50530be","label":"jenkinsci/code-coverage-api-plugin@a5b3c18"},"references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/08/31/1"},{"type":"ADVISORY","url":"https://www.jenkins.io/security/advisory/2021-08-31/#SECURITY-2376"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21677"},{"type":"WEB","url":"https://github.com/jenkinsci/code-coverage-api-plugin/commit/a5b3c18cff2a0b494c55fa73b05fc935b50530be"},{"type":"PACKAGE","url":"https://github.com/jenkinsci/code-coverage-api-plugin"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T00:12:28.173789Z"}}