Express.js is a popular web framework for Node.js, but securing your applications requires attention to key areas. Here's a guide to help you protect your app effectively:

1. Core Security Practices

  • Use Helmet to set secure HTTP headers:

    helmet_security
    [Helmet Documentation](https://helmetjs.github.io/)

  • Enable CORS properly with cors middleware:

    cors_configuration
    [CORS Guide](/en/guides/express_js_cors_configuration)

  • Validate Input with express-validator to prevent injection attacks:

    input_validation
    [Input Validation Tools](/en/resources/input_validation_tips)

2. Authentication & Authorization

  • Implement JWT (JSON Web Tokens) for stateless authentication:

    jwt_authentication
    [JWT Implementation Tips](/en/tutorials/express_js_jwt_setup)

  • Use passport.js for OAuth and session management:

    passport_js
    [Passport.js Overview](/en/resources/passport_js_guide)

3. Secure HTTP Headers

  • Set X-Content-Type-Options to prevent MIME-type sniffing:
    x_content_type_options
    [Header Configuration Examples](/en/guides/express_js_headers)

4. Rate Limiting

  • Prevent brute force attacks with express-rate-limit:
    rate_limiting
    [Rate Limiting Setup](/en/tutorials/express_js_rate_limit)

5. Common Vulnerabilities to Avoid

  • ❌ XSS (Cross-Site Scripting): Sanitize user input using libraries like dompurify
  • ❌ CSRF (Cross-Site Request Forgery): Use csurf middleware for protection
  • ❌ SQL Injection: Always use ORM or parameterized queries

For deeper insights into Express.js security, check out our Security Best Practices Guide. 📚