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  1. Web Security Academy
  2. OAuth authentication
  3. Lab

Lab: Authentication bypass via OAuth implicit flow

APPRENTICE

This lab uses an OAuth service to allow users to log in with their social media account. Flawed validation by the client application makes it possible for an attacker to log in to other users' accounts without knowing their password.

To solve the lab, log in to Carlos's account. His email address is carlos@carlos-montoya.net.

You can log in with your own social media account using the following credentials: wiener:peter.

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The benefits of working through PortSwigger's Web Security Academy
  • Practise exploiting vulnerabilities on realistic targets.

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