Sanitization libraries help developers render untrusted HTML safely, but they can’t stop every injection attack. A 2023 study from Technische Universität Braunschweig found that 9 of 11 tested HTML sanitization libraries were vulnerable to mutation cross-site scripting (mXSS) bypasses under…
Input sanitization and output encoding serve different security purposes. Sanitization changes data based on a defined policy, while encoding makes data safe for a specific output context. OWASP recommends context-aware encoding to reduce cross-site scripting (XSS) risks. Input validation also…
Cross-site scripting (XSS) lets attackers inject malicious scripts into web pages when browsers treat untrusted data as executable code. HTML sanitization helps block these attacks, but it’s not enough on its own. Developers also need contextual output encoding and safe…
Cross-site scripting (XSS) prevention starts with validating untrusted input, sanitizing HTML, and encoding output based on its context. Each step helps stop attackers from injecting malicious scripts into web pages. OWASP recommends using these controls alongside secure rendering practices to…