The host is installed with SharePoint Server 2013 Client Components SDK, Microsoft Office Web Apps Server 2013, SP1, Microsoft SharePoint Server 2013 or Microsoft SharePoint Foundation 2013 and is prone to elevation of privilege vulnerability. A flaw is present in the applications, which fail to properly sanitize a specially crafted request to an affected SharePoint server. Successful exploitation allows attackers to perform cross-site scripting attacks on affected systems and run script in the security context of the logged-on user.