Top 10 Application Security Tips Every Developer Must Know in 2025
1. Keep Software Dependencies Updated
Use tools like Dependabot or npm audit to detect vulnerabilities in third-party libraries.
2. Use Secure Authentication
Implement OAuth2.0, 2FA, and never store passwords in plain text.
3. Validate User Input
Prevent XSS and SQL Injection attacks using strong validation and sanitization.
4. HTTPS Everywhere
Always use HTTPS to encrypt data between client and server.
5. Access Control
Implement Role-Based Access Control (RBAC) to prevent unauthorized access.
6. Secure APIs
Use API keys, tokens, and proper rate limiting to protect your endpoints.
7. Error Handling
Do not expose internal server errors to users. Always log errors securely.
8. Data Encryption
Encrypt sensitive data at rest and in transit using AES-256 or similar algorithms.
9. Session Management
Set proper session timeouts and use HttpOnly, Secure cookies.
10. Regular Pen Testing
Hire professionals or use tools like OWASP ZAP and Burp Suite for regular penetration testing.
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