Cross-site scripting (XSS) vulnerability in Microsoft SharePoint Server 2013 Gold and SP1, SharePoint Foundation 2013 Gold and SP1, Office Web Apps Server 2013 Gold and SP1, and SharePoint Server 2013 Client Components SDK allows remote attackers to inject arbitrary web script or HTML via a crafted request, aka "SharePoint XSS Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-022