Follow these security best practices:
- Use latest versions: Keep scripts updated with security patches
- Proper permissions:
- Scripts: 755 (not 777)
- Data files: 644 or 666 only if needed
- Configure referers: Limit which domains can access your scripts
- Validate input: Don't trust user-submitted data
- Protect data files: Store them outside the web root if possible
- Use .htaccess: Restrict access to sensitive directories
Warning: Never set permissions to 777. This is a major security risk.