A story about how I got several simple bugs (1 P2, 1 P3, and 2 P4s) on a target (that just allow Specific Country Code to Register) by using Premium Phone Number. — بسم الله الرحمن الرحيم Mirroring from: http://www.firstsight.me/2020/06/from-399-to-1650-usd-part-i-simple-vertical-privilege-escalation-by-changing-http-response/ As usual, I will try to release this article with two different approaches, which are: