Security vulnerabilities can be devastating. Here's how to protect your applications from common attacks.
Cross-Site Scripting (XSS)#
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Cross-Site Request Forgery (CSRF)#
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SQL Injection#
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Security Headers#
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Authentication Security#
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Input Validation#
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File Upload Security#
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Secrets Management#
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Security Checklist#
Authentication:
✓ Hash passwords with bcrypt/argon2
✓ Implement rate limiting
✓ Use secure session settings
✓ Implement MFA where appropriate
Data:
✓ Validate all input
✓ Escape all output
✓ Use parameterized queries
✓ Sanitize file uploads
Transport:
✓ Use HTTPS everywhere
✓ Set security headers
✓ Configure CORS properly
✓ Use secure cookies
Secrets:
✓ Never commit secrets
✓ Use environment variables
✓ Rotate credentials regularly
✓ Use secrets manager in production
Conclusion#
Security requires defense in depth. Validate input, escape output, use parameterized queries, set security headers, and manage secrets properly. Regular security audits and staying updated on vulnerabilities are essential for maintaining secure applications.