Apache Struts is vulnerable to Cross-site Scripting
Multiple cross-site scripting (XSS) vulnerabilities in Apache Struts 2.0.x before 2.0.11.1 and 2.1.x before 2.1.1 allow remote attackers to inject arbitrary web script or HTML via vectors associated with improper handling of (1) " (double quote) characters in the href attribute of an s:a tag and (2) parameters in the action attribute of an s:url tag.