pentester.land· Jun 20, 2023· by Descope (@descopeinc)

nOAuth: How Microsoft OAuth Misconfiguration Can Lead to Full Account Takeover

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Target Program: Microsoft (Azure AD)
🎯 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#Account takeover