MedicalDoc is a web application designed to foster learning and practice of web security skills, specifically within the context of Capture The Flag (CTF) challenges. This project simulates a medical records management software, offering security enthusiasts a secure and controlled platform to explore and learn about common vulnerabilities in web applications. Based on .NET MVC: Developed using .NET MVC technology, MedicalDoc is a modern and scalable application that offers a smooth and familiar user experience for those familiar with web development in the .NET ecosystem.