Securing Web forms in React
Securing Web forms in React Practical Guidelines for Preventing XSS and Data Injection in Web Forms Introduction Forms are a key part of most web applications. They handle user data entry, authentication, and configuration. Because they accept external input, forms are also one of the main sources of security vulnerabilities such as: Cross-Site Scripting (XSS) Data Injection Phishing via injected form markup React automatically escapes user-provided data in JSX, which prevents many common injection attacks. However, as applications scale and integrate with user-generated or external content, teams must apply consistent input sanitization and validation patterns . This document defines standard practices for React-based projects to ensure that user input is handled safely across the application. Core Principle: Validate Input, Encode Output Every piece of user-provided data should be treated as untrusted . “Never trust input that originates outside your code.” Stage Action Ex...