Need help exploiting a website
So I found a vulnerability on a website that if I found an exploit to would be gg no re. I was wondering if anyone was experienced with scripting and would tell me whats my next step. If I try to do anything with <script> or any evasion shit from here it just shows a blank page and no alert shit.
Basically I can run all html except for a few like iframe. If anyone has any ideas to exploit this let me know by replying /gewd
This is what I have so far:
https://i.gyazo.com/98243f31fbce34f5...bc7791a75b.png
This is what I did to get this:
Code:
https://website.com/kek/kek/kek.do?key=<img%20src="https://i2.kym-cdn.com/photos/images/newsfeed/000/960/777/2b7.jpg"%20alt="Mountain%20View"%20style="width:304px;height:228px;">%20<br>%20<h1>dank%20memes%20cant%20melt%20steel%20beams</h1>