This document summarizes common web application security issues and solutions. It discusses SQL injection, where malicious SQL code can be inserted into username/password fields, and demonstrates how to inject SQL. It also covers cross-site scripting (XSS), where script code can be submitted and run on a site. Potential data exposure issues are overviewed. The document recommends using framework features and error codes without unnecessary information. It promotes attending trainings from Microsoft leaders to enhance knowledge of cutting edge technologies.