I discovered a single XSS finding, with the ability to pop-up only a numeric value. I was able to see that my variable was getting included inside of some javascript in the returned page. I started adding more commands with a semi-colon at the end and low and behold they worked! As long as I didn’t use a ‘>’ character and trigger the .NET validation routines. It’s interesting because you can inject just about any javascript you want, and that leaves a lot of room for client-side mischief like false web sites to harvest passwords, etc.
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