Security Challenges in Java Full Stack Development: A Case Study Approach

As web applications become increasingly complex, securing full stack systems—particularly those built on the Java ecosystem—presents a growing challenge for developers and organizations. This paper explores the common security threats and vulnerabilities inherent in Java-based full stack development, using a case study-driven approach to highlight practical examples and real-world implications. Key focus areas include front-end and back-end attack vectors, misconfigurations, insecure APIs, and insufficient authentication and authorization mechanisms. By analyzing actual incidents and project scenarios, the study provides a comprehensive understanding of where security breakdowns occur and how they can be mitigated through best practices, secure coding principles, and modern DevSecOps strategies. The findings aim to enhance awareness among Java developers and architects, offering actionable insights to build more resilient and secure applications across the full stack.