HomeReadTactics deskMass assignment bugs let users escalate privileges via API calls
Tactics·Jul 21, 2026

Mass assignment bugs let users escalate privileges via API calls

Tactic · Dev.to · stat: — Mass assignment vulnerabilities occur when an API binds user-submitted data directly to an internal model without filtering. This allows attackers to modify fields they…

Tactic · Dev.to · stat: —

Mass assignment vulnerabilities occur when an API binds user-submitted data directly to an internal model without filtering. This allows attackers to modify fields they shouldn't access, like adding isAdmin: true to a JSON payload. The bug is common in frameworks that simplify object creation from request bodies.

A classic bug modern ORMs still make dangerously easy to write. Whitelist API parameters to prevent users from self-assigning admin roles.

Source

Sources · how we verified
  1. https://dev.to/khuepm/the-hotel-upgrade-hack-mass-assignment-vulnerabilities-in-apis-3h62

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