How serious is this new ASP.NET security vulnerability and how can I workaround it?

What should I do to protect myself? [Update 2010-09-29] Microsoft security bulletin KB Article with reference to the fix ScottGu has links for the downloads [Update 2010-09-25] While we are waiting for the fix, yesterday ScottGu postet an update on how to add an extra step to protect your sites with a custom URLScan rule. … Read more