OAuth2: Client OpenRedirect

This exercise covers the exploitation of an OpenRedirect in the OAuth2 Client

< 1 Hr.


In this exercise, we explore how an insecure OAuth2 Client can be compromised through a vulnerability known as Open Redirect. The lab demonstrates how attackers can trick victims into interacting with a malicious link to the Authorization Server. This link contains a Redirect URL that points to the OAuth2 Client’s Open Redirect feature, allowing attackers to retrieve the OAuth2 code and state.

The exercise includes a step-by-step walkthrough of initiating an OAuth2 "Dance," intercepting and modifying the redirect URL to include the attacker's server, and manipulating the victim into visiting this URL. By doing so, the attacker captures the OAuth2 code and completes the authentication process, thereby gaining unauthorized access to protected resources. This vulnerability is critical as it can be exploited to impersonate users and access sensitive data.

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