Security feature bypass

A sandbox bypass vulnerability exists in Jenkins Email Extension Plugin 2.64 and earlier in pom.xml, src/main/java/hudson/plugins/emailext/ExtendedEmailPublisher.java, src/main/java/hudson/plugins/emailext/plugins/content/EmailExtScript.java, src/main/java/hudson/plugins/emailext/plugins/content/ScriptContent.java, src/main/java/hudson/plugins/emailext/plugins/trigger/AbstractScriptTrigger.java that allows attackers with Job/Configure permission to execute arbitrary code on the Jenkins master JVM.