How to Sanitize User Input for XSS: Pros and Cons
XSS defenses go wrong when teams treat “sanitize user input” like a single magic step. It isn’t. Different kinds of input need different handling, and some of the most common advice online is flat-out incomplete. My opinion: if you only remember one thing, remember this — validate for business rules, encode for output, and sanitize only when you intentionally allow HTML. That distinction matters because “sanitizing input” can mean wildly different things: ...