{"id":"CVE-2021-39132","aliases":["GHSA-q4rf-3fhx-88pf"],"url":"https://o3.security/vulnerability/CVE-2021-39132","summary":"YAML deserialization can run untrusted code","details":"### Impact\n\nAn authorized user can upload a zip-format plugin with a crafted plugin.yaml, or a crafted aclpolicy yaml file, or upload an untrusted project archive with a crafted aclpolicy yaml file, that can cause the server to run untrusted code on Rundeck Community or Enterprise Edition.  An authenticated user can make a POST request, that can cause the server to run untrusted code on Rundeck Enterprise Edition.\n\nThe zip-format plugin issues requires authentication and authorization to these access levels, and affects all Rundeck editions:\n\n* `admin` level access to the `system` resource type\n\nThe ACL Policy yaml file upload issues requires authentication and authorization to these access levels, and affects all Rundeck editions: \n\n* `create` `update` or `admin` level access to a `project_acl` resource\n* `create` `update` or `admin` level access to the `system_acl` resource\n\nThe unauthorized POST request requires authentication, but no specific authorization, and affects Rundeck Enterprise only.\n\n### Patches\nVersions 3.4.3, 3.3.14\n\n### Workarounds\n\nPlease visit [https://rundeck.com/security](https://rundeck.com/security) for information about specific workarounds.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [security@rundeck.com](mailto:security@rundeck.com)\n\nTo report security issues to Rundeck please use the form at [https://rundeck.com/security](https://rundeck.com/security)\n\nReporter: Rojan Rijal from Tinder Red Team","published":"2021-08-30T20:15:07.660Z","modified":"2026-07-09T12:20:09.685132Z","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":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.rundeck:rundeck-core","fixedVersion":"3.4.3"},{"ecosystem":"Maven","name":"org.rundeck:rundeck-core","fixedVersion":"3.3.14"}],"fix":{"url":"https://github.com/rundeck/rundeck/commit/850d12e21d22833bc148b7f458d7cb5949f829b6","label":"rundeck/rundeck@850d12e"},"references":[{"type":"ADVISORY","url":"https://github.com/rundeck/rundeck/security/advisories/GHSA-q4rf-3fhx-88pf"},{"type":"FIX","url":"https://github.com/rundeck/rundeck/commit/850d12e21d22833bc148b7f458d7cb5949f829b6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39132"},{"type":"PACKAGE","url":"https://github.com/rundeck/rundeck"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T12:20:09.685132Z"}}