pentester.land· Dec 13, 2018· by Avinash Jain (@logicbomb_1)

#BugBounty — “User Account Takeover-I just need your email id to login into your shopping portal account”

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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#Authentication bypass#Account takeover