Cybersecurity Basics Every Developer Should Know Important

Security First

Security isn't optional. Learn to protect your apps from day one.

Common Vulnerabilities

1. SQL Injection

// Vulnerable
db.query(`SELECT * FROM users WHERE id = ${userId}`);

// Safe
db.query('SELECT * FROM users WHERE id = ?', [userId]);

2. XSS (Cross-Site Scripting)

Always sanitize user input before rendering.

3. CSRF (Cross-Site Request Forgery)

Use CSRF tokens for state-changing operations.

Security Checklist

• ✅ Use HTTPS everywhere
• ✅ Hash passwords (bcrypt)
• ✅ Implement rate limiting
• ✅ Validate all inputs
• ✅ Keep dependencies updated
• ✅ Use security headers