A cross-site request forgery (CSRF) vulnerability in Jenkins Mailer Plugin 391.ve4a_38c1b_cf4b_ and earlier allows attackers to use the DNS used by the Jenkins instance to resolve an attacker-specified hostname.
https://www.oracle.com/security-alerts/cpuapr2022.html
https://www.jenkins.io/security/advisory/2022-01-12/#SECURITY-2163