How to Prevent Cross-Site Scripting (XSS) on Payment Pages
Many teams believe that cross-site scripting, or XSS, is a problem of the past. Modern frameworks promise built-in protections, and developers often assume the browser will handle the rest. The reasoning sounds logical: if React auto-encodes output, XSS can’t happen. However, XSS prevention doesn’t work on assumptions; it works on visibility. We’ve learned that XSS prevention is about maintaining continuous control over the browser environment where your application runs.