Cyber Risks · PortSwigger Research

Lab: Authentication bypass via information disclosure

Summary: This PortSwigger lab presents an administration interface with an authentication bypass vulnerability that cannot practically be exploited without knowing a custom HTTP header used by the front-end. Solving it requires obtaining that header name, using it to bypass authentication, accessing the admin interface, and deleting the user carlos, with wiener:peter provided as login credentials.

Key Takeaway: The lab's premise is that a front-end header meant to be internal is enough to defeat authentication entirely - the kind of detail that leaks through TRACE responses and error messages rather than through any exploit.

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Topics
Vulnerabilities & Patching
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