• URL Parameter Filtering: Blocks SQL keywords in URLs (SELECT, UNION, DROP, INSERT, UPDATE, DELETE, EXEC, SCRIPT)
• Pattern Matching: Detects and blocks SQL injection patterns
• Query String Validation: Prevents malicious query strings

RewriteCond %{QUERY_STRING} (SELECT|UNION|DROP|INSERT|UPDATE|DELETE|EXEC|SCRIPT).*(\(|%28) [NC]
RewriteRule ^(.*)$ - [F,L]

• Input Validation: validateSearchInput() function sanitizes all user input
• SQL Keyword Blocking: Prevents SQL keywords in search queries
• Character Filtering: Removes dangerous characters

const sqlPattern = /(SELECT|INSERT|UPDATE|DELETE|DROP|CREATE|ALTER|EXEC)/gi;

• Script Tag Blocking: Prevents <script> tags in URLs
• Event Handler Blocking: Blocks onclick, onload, onerror, etc.
• JavaScript Protocol Blocking: Prevents javascript: URLs
• Base64 Encoding Prevention: Blocks base64_encode/decode attempts

RewriteCond %{QUERY_STRING} (<|%3C)([^s]*s)+cript.*(>|%3E) [NC]
RewriteCond %{QUERY_STRING} (on(load|error|mouse|click|key|focus|blur))\s*= [NC]
RewriteRule ^(.*)$ - [F,L]

• HTML Sanitization: sanitizeHTML() escapes all HTML entities
• Attribute Sanitization: sanitizeAttribute() for safe HTML attributes
• URL Sanitization: sanitizeURL() blocks dangerous protocols

function sanitizeHTML(str) {
  const temp = document.createElement('div');
  temp.textContent = str;
  return temp.innerHTML;
}

• X-XSS-Protection: Browser XSS filter enabled
• Content-Security-Policy: Strict CSP rules
• X-Content-Type-Options: Prevents MIME type sniffing

Header set X-Frame-Options "SAMEORIGIN"

• Prevents site from being embedded in iframes
• Blocks clickjacking attacks

Header set Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://cdn.tailwindcss.com https://cdnjs.cloudflare.com; ..."

Policies:

• Scripts only from trusted CDNs
• Styles only from self and trusted sources
• Images from self and HTTPS sources
• No inline scripts except from trusted sources
• Frame ancestors restricted to self

• Path Traversal Blocking: Prevents ../ and ..\ attempts
• Remote File Inclusion: Blocks external file loading via query strings
• HTTP Parameter Pollution: Validates all parameters

Blocked User Agents:

• libwww-perl, wget, python (scripts)
• nikto, sqlmap, acunetix (scanners)
• nmap, nessus (vulnerability scanners)

Blocked Request Methods:

• TRACE, DELETE, TRACK, PUT

const rateLimiter = {
  maxRequests: 50,
  timeWindow: 60000, // 1 minute
}

• Client-Side: Limits search requests to 50 per minute
• Prevents abuse and DoS attempts

Options -Indexes

• Prevents directory listing
• Hides file structure

Hidden Files:

• .htaccess, .git, .env
• Backup files (.bak, .backup, .old)
• Temporary files (.tmp, .swp)
• Configuration files

Header set X-Content-Type-Options "nosniff"

• Prevents browsers from MIME-sniffing
• Forces declared content types

1. SQL Injection Test:

   Try URL: /modules.html?search=SELECT * FROM users
   Expected: 403 Forbidden
   

2. XSS Test:

   Try search: <script>alert('XSS')</script>
   Expected: Sanitized output, no execution
   

3. Path Traversal Test:

   Try URL: /module.html?name=../../etc/passwd
   Expected: Blocked or sanitized
   

4. Clickjacking Test:

   Try embedding: <iframe src="your-site"></iframe>
   Expected: Blocked by X-Frame-Options

• OWASP ZAP: Security scanner
• Burp Suite: Web vulnerability scanner
• SQLMap: SQL injection testing
• XSSer: XSS detection

• SQL Injection protection (server & client)
• XSS protection (server & client)
• CSRF protection (same-origin policy)
• Clickjacking protection
• Directory traversal protection
• File injection protection
• Bad bot blocking
• Rate limiting
• Secure headers (10+ headers)
• Input sanitization
• Output encoding
• URL validation
• Content Security Policy
• Directory browsing disabled
• Sensitive file protection
• MIME type enforcement

1. Immediate Action:

   • Document the vulnerability
   • Assess impact and scope
   • Implement temporary fix

2. Fix Development:

   • Update .htaccess rules
   • Update security.js functions
   • Test thoroughly

3. Deployment:

   • Deploy fix immediately
   • Monitor logs for exploitation attempts
   • Notify users if needed

4. Post-Incident:

   • Document lesson learned
   • Update security documentation
   • Conduct security audit

• Review security logs
• Update security headers
• Test security measures

• Run automated security scans
• Review and update CSP
• Update dependency versions

• Full security audit
• Penetration testing
• Update security documentation

• OWASP Top 10
• Content Security Policy Guide
• Security Headers Best Practices
• XSS Prevention Cheat Sheet
• SQL Injection Prevention

• No server-side validation (relies on .htaccess)
• No database (no SQL injection risk in practice)
• No user authentication (no session hijacking risk)
• No form submissions (limited CSRF risk)

• Can be bypassed by disabling JavaScript
• Rate limiting can be circumvented
• Always validate server-side when possible

• Trusted CDNs (Tailwind, Font Awesome)
• Subresource Integrity (SRI) recommended for production

Security Status: ✅ HARDENED Last Updated: January 25, 2025 Threat Model: Low-risk static documentation site Security Level: Production-ready with multiple layers of defense

Built with security in mind 🛡️