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check-mass-assignment

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Detects mass assignment vulnerabilities. Identifies unguarded model filling, Request::all() to create/update, missing $fillable/$guarded, and parameter binding without whitelisting.

skills/check-mass-assignment/SKILL.md

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# Mass Assignment Security Check (A01:2021)

Analyze PHP code for mass assignment vulnerabilities where user input directly populates model attributes.

## Detection Patterns

### 1. Request::all() Passed to Create/Update

```php
// CRITICAL: All request data used to create model
class UserController
{
    public function store(Request $request): Response
    {
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