Mass Assignment
Challenge Question
This API's registration endpoint accepts a JSON body and builds the new user record straight from whatever fields you send it, with no filtering and no whitelist. See what happens if you include a field the signup form was never designed to expose.Submit Flag
Details
- CategoryAPI Security
- Authoradmin
- AddedJul 4, 2026
- Avg. Time to Solve7h 50m
- First Blood🩸 prompt_inject
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prompt_inject
Jul 4, 2026