KLA11089
XSS vulnerability in Microsoft Sharepoint Server

An XSS (cross-site scripting) vulnerability related to an improper sanitizing of web requests was found in Microsoft SharePoint Server. By exploiting this vulnerability malicious users can spoof user interaface. This vulnerability can be exploited remotely via a specially designed web request.

Microsoft SharePoint Server 2010 Service Pack 2

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)