pentester.land· Oct 24, 2021· by Gaurav Narwani (@gauravnarwani97), Verneet (@err0rrrrr)

Account Takeover via improper input validation

Target Program: -

🎯 Vulnerability: OAuth 2.0 / JWT Authentication Bypass

💡 Defense Fix: Strictly verify JWT signatures on the backend, enforce state parameter validation, and reject 'alg: none'.

#OAuth#Token leak#Account takeover