Sow Ching Shiong, an independent vulnerability researcher has discovered a Cross-Site Scripting (XSS) vulnerability in connect.microsoft.com, which can be exploited by an attacker to conduct XSS attacks.
Proof of concept
Tested in IE9 with XSS filter enabled
http://connect.microsoft.com/sqlserver/searchresults.aspx?UserHandle=%2522%253E%2527%253E%253Cscript%2520%253Ealert%2528/XSS by Sow Ching Shiong/%2529%253B%253C%252Fscript%2520%253E
This vulnerability has been confirmed and patched by Microsoft Security Team. I would like to thank them for their quick response to my report.
Microsoft White Hat