What You Will Learn

• What OWASP Top 10 represents.
• Common Java and Spring Boot risks.
• Practical prevention patterns.
• How OWASP maps to production engineering.

Introduction

OWASP Top 10 is a list of common web application security risks.

For Java developers, it is a practical checklist for designing, coding, testing, and deploying safer applications.

Key Risks

Risk	Java Prevention Pattern
Broken access control	Enforce authorization on server side
Cryptographic failures	Use strong encryption and key management
Injection	Use parameterized queries and validation
Insecure design	Threat model critical flows
Security misconfiguration	Harden defaults and headers
Vulnerable components	Scan dependencies
Authentication failures	Use strong auth and MFA
Data integrity failures	Verify signatures and supply chain
Logging failures	Log security events safely
SSRF	Restrict outbound requests

Example: Broken Access Control

Bad pattern:

Only hide the admin button in the UI.

Good pattern:

@PreAuthorize("hasRole('ADMIN')")
public void deleteUser(Long userId) {
}

Example: Injection Prevention

Use parameterized queries instead of string concatenation.

@Query("select u from User u where u.email = :email")
Optional<User> findByEmail(@Param("email") String email);

Secure SDLC Practices

• Code review.
• Dependency scanning.
• Security tests.
• Threat modeling.
• Secrets scanning.
• Production monitoring.

Summary

OWASP Top 10 helps Java developers focus on the most common application security failures and prevention patterns.

Learning Path Navigation

• Series home: Spring Security Learning Path
• Previous: Secure Logging and Preventing Sensitive Data Leaks
• Next: Input Validation and SQL Injection Prevention