Updated struts packages fix security vulnerabilities:
A vulnerability in Apache Struts 1 ActionForm allowing unintended remote operations against components on server memory, such as Servlets and ClassLoader, was found (CVE-2016-1181).
It was reported that The Apache Struts 1 Validator contains a vulnerability where input validation configurations (validation rules, error messages, etc.) may be modified. This occurs when ValidatorForm and ValidatorActionForm (including its subclasses) are in the session scope (CVE-2016-1182).