Complete XSS Testing Methodology: From Reflection to Full Exploitation Introduction Cross-Site Scripting (XSS) is still one of the most common and impactful web vulnerabilities. Most beginners only test: alert(1) But real-world XSS requires much more: context analysis, DOM sinks, framework behavior, filter bypasses, stored execution, and proper impact validation. In this guide, I’ll show the practical methodology I use. Phase 1: Reconnaissance Start with: Identify all input points Query parameters POST requests Cookies Headers File uploads JSON/XML payloads Never test blindly. Mapping entry points is the foundation. Phase 2: Context Discovery Find where input reflects: HTML Body HTML Attribute JavaScript String Event Handler Framework Templates URL Reflection This decides your payload strategy. Example: "> works for attribute context.…