pentester.land· Oct 19, 2022· by Souhaib Naceri (@h4x0r_dz)💰 Bounty: 23,000

23000$ for Authentication Bypass & File Upload & Arbitrary File Overwrite

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'.

#JWT#Authentication bypass#Arbitrary file write#Unrestricted file upload