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Certified Ethical Hacker (CEH) Practice Question

During a grey-box assessment of an organization's RESTful web service, the tester obtains a valid API key tied to account ID 164. The endpoint /api/v2/users/164 responds with that user's details, but no other authentication controls are observed. Which single request would best confirm a Broken Object Level Authorization (BOLA) weakness?

  • Add the header Host: 127.0.0.1 to the original GET request to attempt host-header injection.

  • Append the payload ?id=164 OR 1=1-- to the endpoint to test for SQL injection errors.

  • Issue a TRACE request to /api/v2/users/164 to check if the server echoes the header contents.

  • Send GET /api/v2/users/165 with the same API key and observe whether another user's data is returned.

Certified Ethical Hacker (CEH)
Web Application Hacking
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