security-best-practices

To prevent XSS and SQL injection in an Express.js application, implement input validation with Joi and sanitize user inputs using isomorphic-dompurify. This blocks malicious scripts and unauthorized database commands from executing.

The best way to configure security headers and HTTPS enforcement for an API is using Helmet in Express.js. Helmet sets HTTP headers like Strict-Transport-Security to enforce HTTPS and mitigate common web vulnerabilities.

CSRF protection works with JSON Web Tokens and cookies by using the csurf library alongside cookie-parser. It validates anti-CSRF tokens generated on the server side against tokens stored in user cookies.

Yes, you can use express-rate-limit to prevent API brute force attacks by defining maximum request thresholds per IP address. It restricts excessive requests, automatically returning a rate limit exceeded error.

Yes, you need an existing Express.js backend to apply these security measures. The skill integrates dependencies like express, helmet, and csurf directly into your server middleware to enforce vulnerabilities protection.