Apache Struts 2 before 2.3.29 and 2.5.x before 2.5.1 allow attackers to have unspecified impact via vectors related to improper action name clean up.
https://struts.apache.org/docs/s2-035.html
http://www.securityfocus.com/bid/91280
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html