What are some security tips for Express.js applications?

What are some security tips for Express.js applications?

To secure your Express.js applications, consider the following tips: 1. Use Helmet to set secure HTTP headers. 2. Validate and sanitize user input to prevent injection attacks. 3. Implement proper authentication and authorization. 4. Use HTTPS to encrypt data in transit. 5. Keep your dependencies updated.

Can you explain how Helmet works?

Helmet is a middleware for Express.js that helps secure your app by setting various HTTP headers. It can protect against common vulnerabilities like cross-site scripting (XSS) and clickjacking by setting headers like Content Security Policy, X-Frame-Options, and others.

What are some common vulnerabilities I should be aware of?

Common vulnerabilities in Express.js applications include SQL injection, cross-site scripting (XSS), cross-site request forgery (CSRF), and insecure deserialization. It's crucial to validate and sanitize all user inputs to mitigate these risks.

How can I implement HTTPS in my Express.js app?

To implement HTTPS, you can use the 'https' module in Node.js. You'll need an SSL certificate, which you can obtain from a certificate authority. Then, create an HTTPS server using your certificate and key, and listen on port 443.