Secure Spring Boot applications

Validate and manage Spring Boot authentication and authorization

Securing REST APIs with JWT, OAuth2, or session auth; input validation; CORS/CSRF protection.

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• · Spring Security
• · JWT library
• · BCrypt
• · Spring Data

Spring Boot 3.0+; Spring Security dependency; endpoints defined.

• · JWT token expired or tampered
• · SQL injection via unsanitized input
• · CSRF token missing in form submission
• · Secrets hardcoded in application.yml

• · Demonstrates BCrypt(12) for password hashing
• · Shows OncePerRequestFilter for token validation
• · CORS configured with explicit origins, not *