The REST plugin in Apache Struts 2 2.3.19 through 2.3.28.1 allows remote attackers to execute arbitrary code via a crafted expression.Referenceshttps://bugzilla.redhat.com/show_bug.cgi?id=1348238http://www.securityfocus.com/bid/91275https://struts.apache.org/docs/s2-037.htmlhttp://jvndb.jvn.jp/jvndb/JVNDB-2016-000110http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.htmlhttp://jvn.jp/en/jp/JVN07710476/index.html