Overview:
Struts2 is an open-source web application framework for Java.
Struts2 (v2.0.0 - 2.3.15) is vulnerable to remote OGNL injection which
leads to arbitrary Java method execution on the target server. This is
caused by insecure handling of prefixed special parameters (action:,
redirect: and redirectAction:) in DefaultActionMapper class of Struts2