Apache Struts 2.0.0 through 2.3.15 allows remote attackers to execute arbitrary OGNL expressions via a parameter with a crafted (1) action:, (2) redirect:, or (3) redirectAction: prefix.

The Apache Struts REST Plugin is using XStream library which is vulnerable and allow perform a DoS attack when using a malicious request with specially crafted XML payload. Upgrade to the Apache Struts version 2.5.16 and switch to an optional Jackson XML handler as described here http://struts.apache.org/plugins/rest/#custom-contenttypehandlers. Another option is to implement a custom XML handler based on the Jackson XML handler from the Apache Struts 2.5.16.

The token check mechanism in Apache Struts 2.0.0 through 2.3.4 does not properly validate the token name configuration parameter, which allows remote attackers to perform cross-site request forgery (CSRF) attacks by setting the token name configuration parameter to a session attribute.

CookieInterceptor in Apache Struts 2.x before 2.3.20, when a wildcard cookiesName value is used, does not properly restrict access to the getClass method, which allows remote attackers to "manipulate" the ClassLoader and modify session state via a crafted request. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-0113.

Apache Struts 2.0.0 through 2.3.4 allows remote attackers to cause a denial of service (CPU consumption) via a long parameter name, which is processed as an OGNL expression.

Multiple cross-site scripting (XSS) vulnerabilities in component handlers in the javatemplates (aka Java Templates) plugin in Apache Struts 2.x before 2.2.3 allow remote attackers to inject arbitrary web script or HTML via an arbitrary parameter value to a .action URI, related to improper handling of value attributes in (1) FileHandler.java, (2) HiddenHandler.java, (3) PasswordHandler.java, (4) RadioHandler.java, (5) ResetHandler.java, (6) SelectHandler.java, (7) SubmitHandler.java, and (8) TextFieldHandler.java.