Cross-site scripting (XSS) vulnerability in System.Web.Mvc.dll in Microsoft ASP.NET Model View Controller (MVC) 2.0 through 5.1 allows remote attackers to inject arbitrary web script or HTML via a crafted web page, aka "MVC XSS Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-059
http://www.securitytracker.com/id/1031023
http://www.securityfocus.com/bid/70352