Introduction
Web security is not optional, it's a necessity. Every day, thousands of sites are compromised due to avoidable vulnerabilities.
Main Threats
1. Cross-Site Scripting (XSS)
XSS attacks allow an attacker to inject malicious code into a web page.
Protection:
- Escape all user data
- Use Content Security Policy (CSP)
- Validate inputs server-side
2. SQL Injection
SQL injection allows manipulation of your database.
Protection:
- Use prepared statements
- ORM with escaped parameters
- Principle of least privilege
3. Cross-Site Request Forgery (CSRF)
CSRF forces an authenticated user to execute unwanted actions.
Protection:
- CSRF tokens
- Verify request origin
- SameSite cookies
Conclusion
Security is an ongoing process. Stay informed about new threats and update your practices regularly.