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check-secure-headers

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Audits HTTP security headers configuration. Checks CSP, X-Frame-Options, HSTS, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, and cache control headers.

skills/check-secure-headers/SKILL.md

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Last checked
Nov 5, 2026

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Repository last updated
Aug 16, 2026
License
MIT

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# Secure Headers Audit (A05:2021)

Analyze PHP code for missing or misconfigured HTTP security headers.

## Detection Patterns

### 1. Missing Content-Security-Policy (CSP)

```php
// VULNERABLE: No CSP — allows XSS via inline scripts
class ResponseMiddleware
{
    public function handle(Request $request, Response $response): Response
    {