Mass Assignment Medium: Internal Feature Flags

Goal: Unlock the internal labs area or assign yourself a giant discount by submitting server-side fields the UI never intended to expose.

Hints
  • This version tries to look safer because it uses an allowlist.
  • The problem is that the allowlist still includes internal-only properties.
  • Think about fields a browser form could submit even if the visible UI does not show them.
Why this works

A formal allowlist only helps if it contains truly client-editable fields. If internal properties are included, attackers can still assign privileged values.

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Subscription State

Username: User

Plan: starter

Discount: 0%

Internal Labs Access: 0

Update Plan