Welcome to this vulnerable website with incredibly bad security!
Your goal is to exploit many different vulnerabilities in order to fulfill the tasks listed on each page.
The challenges themselves are contained within the iframes on the page.
Some pages have a variety of different "verifiers". Each verifier uses a different kind of protection
against certain attacks. Your goal is to find working attacks against each kind of verifier.
This verifier query parameter is the only part you're not allowed to change.
Apart from that, you are free to change whatever you want in/on the iframes in order to
exploit the site.