You should now be able to see the new cookie parameter in the popup box.
You will need to view the source code of the html page to determine what needs to be changed and how to change it. Verify the form number and set the correct number. The first form is always 0. Next look for the html tag you wish to change. Finally add the new value you want the html tag to be. This will allow you to modify the information within the html form.
Always validate the input received against a whitelist. If you use a blacklist you could and probably will come up against encoding issues. Always use a whitelist when validating input.
Additionally validate the input every time, not just when the data is initially accepted. For example if you set a cookie, make sure that cookie is the same value and it is correct on each and every request. A malicious user could modify and change the value anytime during the session.
Come back soon and we will post some examples of this.
There are many, many more security testing proxy tools, this is just a short list of a few of the quick, easy, and nice tools to use.
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