Defense Principles of XSS in Web Development

Tue, 25 Feb 2025 00:00:00 +0900

Introduction

In web security, Cross-Site Scripting (XSS) stands as one of the oldest and most persistent vulnerabilities.

If malicious scripts run on a victim’s browser, they can compromise the entire session, steal session tokens (cookies), hijack accounts, or dynamically alter page content to harvest sensitive credentials.

This article reviews the fundamental defense principles required to eliminate XSS vulnerabilities in modern web applications. We will explore contextual escaping, sanitization, secure DOM manipulation, and defensive depth mechanisms.

Xss on Commentary of Takao

Defense Principles of XSS in Web Development

Introduction