CVE-2010-2088
ASP.NET in Microsoft .NET 3.5 does not properly handle an unencrypted view state, which allows remote attackers to conduct cross-site scripting (XSS) attacks against the form control via the __VIEWSTATE parameter.
Date published : 2010-05-27
http://www.blackhat.com/presentations/bh-dc-10/Byrne_David/BlackHat-DC-2010-Byrne-SGUI-slides.pdf
https://www.trustwave.com/spiderlabs/advisories/TWSL2010-001.txt