Internet facing applications are prone to many cyber attacks like Phishing, Cross-site Request Forgery, SQL Injection, etc. For a leave management system, this results in not managing the staff properly and excessive leaves. 

Website defacement is an attack on a website that changes the visual appearance of the site or a webpage. These are typically the work of system crackers, who break  into a web server and replace the hosted website with one of their own. Defacement  is generally meant as a kind of electronic graffiti, although recently it has become a  means to spread messages by politically motivated "cyber protesters" or hacktivists​.

It is important to implement Website defacement mitigation controls in the System.

 In this menternship, you will be challenged to use the MVC Dotnet core application & host on Azure Cloud  to create a secure leave management  system free from any known Web Application vulnerabilities & implement Security functions/controls  like Authentication using Azure Active Directory, Role based access controls using IAM Principles, Validation of input data to system etc to mitigate different Web vulnerabilities & protect from misconfiguration for application hosted on cloud. 

For this menternship, a basic understanding of Dotnet core , C#, HTML & SQL, Azure Cloud fundamentals  would help you get started!