Cyber Defence
Security Guide

XSS Attack Prevention Guide

Complete Cross-Site Scripting Protection Strategies

By Amit Kumar|January 20, 2026|13 min read

Understanding XSS Types

Cross-Site Scripting (XSS) allows attackers to inject malicious scripts into web pages. Three main types: Stored XSS (permanent, served to all users), Reflected XSS (in URLs, requires user interaction), and DOM-based XSS (client-side execution).

Prevention Techniques

Key prevention: Input validation, output encoding (HTML, JavaScript, URL), Content Security Policy (CSP) headers, HttpOnly and Secure flags for cookies, and proper use of frameworks that auto-escape.

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