How to solve an XSS challenge from Intigriti in under 60 minutes

Writeup to Intigriti’s 0621 XSS challenge

Twelve hours before the deadline, the latest XSS challenge from Intigriti was only solved by 14 people. Many people ask me how do I solve those challenges so quickly and the answer to that question is probably Experience. But is it only the experience gained from solving XSS challenges…