Apache Struts 2 2.3.20 through 2.3.28.1 mishandles token validation, which allows remote attackers to conduct cross-site request forgery (CSRF) attacks via unspecified vectors.
jvn.jp/en/jp/JVN45093481/index.html
jvndb.jvn.jp/jvndb/JVNDB-2016-000111
www-01.ibm.com/support/docview.wss?uid=ssg1S1009282
www-01.ibm.com/support/docview.wss?uid=swg21987854
www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
www.securityfocus.com/bid/91281
bugzilla.redhat.com/show_bug.cgi?id=1348249
struts.apache.org/docs/s2-038.html