CVE-2021-21641

Name of the Vulnerable Software and Affected Versions Jenkins promoted builds Plugin versions 3.9 and earlier

Description A cross-site request forgery (CSRF) vulnerability allows attackers to promote builds. This issue arises because the plugin does not require POST requests for HTTP endpoints implementing promotion, resulting in CSRF vulnerabilities. A security hardening since Jenkins 2.287 and LTS 2.277.2 prevents exploitation of this vulnerability.

Recommendations For Jenkins promoted builds Plugin versions 3.9 and earlier, update to version 3.9.1 or later, which requires POST requests for the affected HTTP endpoints. As a temporary workaround, consider restricting access to the HTTP endpoints implementing promotion to minimize the risk of exploitation.