An improper authorization vulnerability exists in Jenkins Gerrit Trigger Plugin 2.27.4 and earlier in GerritManagement.java, GerritServer.java, and PluginImpl.java that allows an attacker with Overall/Read access to modify the Gerrit configuration in Jenkins.
https://github.com/advisories/GHSA-4vf2-cm23-rf4c
https://jenkins.io/security/advisory/2018-02-26/#SECURITY-403