Cross-site scripting (XSS) vulnerability in Microsoft SharePoint Server 2010 SP1 and SP2 and 2013 allows remote attackers to inject arbitrary web script or HTML via a crafted POST request, aka "POST XSS Vulnerability."
Improper Neutralization of Input During Web Page Generation The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.