Dom-Based Cross-Site Scripting Vulnerability – Testing, Prevention, and Fixing

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【DOM-based XSS Vulnerability】ALL You Need To Know

Feb 25, 2022
Sudip Sengupta

While Document Object Model (DOM) offers a powerful and flexible approach to modifying elements of a document, it can also be used as an attack vector. This article explores the basics, standard attack techniques, and best practices on how organizations can prevent DOM-based XSS attacks.

Table of contentsWhat is DOM?What is DOM-based XSS?How to Prevent DOM XSS and its Importance in SecurityWhy is Preventing DOM XSS Important for your Business?DOM-based XSS ExamplesFAQs What is DOM?

The Document Object Model (DOM) is a programming interface that defines how to create, modify or erase elements in an HTML or XML document. DOM provides a standard API for the dynamic modification of the content, style, and structure of web page documents. A DOM model represents each element as a node within a tree-like system, enabling easier programmatic access and management of the elements. By allowing the manipulation of documents, a DOM model enables object-oriented web page representation. This way, programming languages like JavaScript can modify and build dynamic web pages. DOM is platform and language-neutral to be used concurrently by multiple applications and environments.

Cross-Site Scripting Explained

Cross-Site Scripting (XSS) is a security vulnerability that allows adversaries to execute malicious code on a victim’s web browser by circumventing the same-origin policy. A successful XSS attack allows the hacker

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