CSharp-Coder

Learn how to prevent cross-site scripting (XSS) in ASP.NET Core with encoding, CSP, and sanitization. Complete guide with C# code examples — read now. Cross-site scripting (XSS) has appeared in every OWASP Top 10 list since the project began, and it remains one of the most commonly reported vulnerabilities in web applications today. If you build web apps with ASP.NET Core, the good news is that the framework gives you strong cross-site scripting prevention out of the box — but only if you understand where those protections apply and, more importantly, where they silently stop applying. This complete guide explains what XSS is, how attackers exploit it, and exactly how to prevent it in ASP.NET Core using output encoding, Content Security Policy, HTML sanitization, and secure cookie configuration. What Is Cross-Site Scripting (XSS)? Cross-site scripting is an injection attack where an attacker gets their own JavaScript to run in another user's browser, in the security con...