Microsoft Security Bulletin MS06-056

Summary
A cross-site scripting vulnerability exists in a server running a vulnerable version of the .Net Framework 2.0 that could inject a client side script in the user's browser. The script could spoof content, disclose information, or take any action that the user could take on the affected web site.
Solution
Microsoft has released a patch to correct this issue, you can download it from the following web site: http://www.microsoft.com/technet/security/Bulletin/MS06-056.mspx