XSS Vulnerabilities Analyzer

Analyzer ID	Category	Severity	Time To Fix
`xss-vulnerabilities`	🛡️ Security	Critical	30 minutes

What This Checks

Scans PHP controllers and Blade views for patterns such as {!! !!} output, direct echo $_GET/request() calls, unescaped Response::make(), and unsafe values inside <script> tags.
Verifies HTTP responses (non-CI environments, non-localhost) to ensure Content-Security-Policy headers exist and forbid unsafe-inline/unsafe-eval; falls back to meta tags when necessary.
Uses router/guest-route discovery to probe a publicly accessible page and confirm CSP enforcement.

Cross-Site Scripting (XSS) remains in OWASP Top 10; a single missing escape allows attackers to hijack sessions, steal CSRF tokens, or pivot into RCE.
Defense in depth: Even if code is sanitized, CSP headers offer a safety net against inline script injection. Conversely, a strong CSP cannot protect an unescaped Blade template.
Regulatory pressure: PCI DSS, SOC2, and bug bounty programs require evidence you audit XSS risks.

Replace unescaped Blade output {!! $var !!} with escaped or explicitly sanitize via e($var) / Purifier.
Wrap $_GET, request() or other user input in htmlspecialchars() / e() before echoing or returning from Response::make().
Add a baseline CSP header (preferably via middleware):

php

return response($html)->header('Content-Security-Policy', "default-src 'self'; script-src 'self' 'nonce-...'");

Audit templates: Identify components, slots, and Livewire views that use {!! !!} or raw echoes—replace with escaped output or whitelist sanitized HTML only where required.
Centralize escaping: Use form requests or DTOs to normalize/sanitize inputs before they hit the view layer.
Enforce CSP: Add a middleware (e.g., SetSecurityHeaders) that sets Content-Security-Policy without unsafe-inline/unsafe-eval; use nonces or hashes for required inline scripts.
Add tests: Write feature tests ensuring responses include the CSP header and that critical templates escape user-controlled content.
Automate: Run this analyzer (or similar static analysis) in CI to block regressions.