This repository maintains a list of client-side library that is vulnerable to HTML injection or contains DOM Clobbering gadgets that can result in severe issues like XSS.

This repository is actively maintained by jackfromeast and ishmeal.

DOM Clobbering is a type of code-less injection attack on the web where attackers first inject a seemingly benign, scriptless HTML markup into a webpage. Then, the injected markup could be unexpectedly loaded by JavaScript through collided named property lookups on the window or document objects, potentially altering program execution and leading to serious security risks such as Cross-site Scripting (XSS) and Client-side Request Forgery (CSRF).

We also recommend checking out the following great websites, papers, and blog posts about DOM Clobbering:

• Introductions:
  • The website DOM Clobbering Wiki offers comprehensive information on attack techniques, vulnerability patterns, and defenses, along with tools for browser testing and payload generation.
  • The blog post "Can HTML affect JavaScript? Introduction to DOM clobbering" by Huli explains how HTML elements can influence JavaScript execution through DOM Clobbering.
• Academic Papers:
  • The paper It’s (DOM) Clobbering Time: Attack Techniques, Prevalence, and Defenses by Soheil Khodayari and Giancarlo Pellegrino presents a systematic study of DOM Clobbering, uncovering various attack techniques, browser behaviors, and vulnerable code patterns, and evaluates existing countermeasures.
  • The paper The DOMino Effect: Detecting and Exploiting DOM Clobbering Gadgets via Concolic Execution with Symbolic DOM by Zhengyu Liu et al. introduces a dynamic analysis tool using symbolic DOM modeling and concolic execution to detect and exploit DOM Clobbering gadgets at scale.
• Cool Real-world Exploitations:
  • The blog post "XSS in GMail’s AMP4Email via DOM Clobbering" by Michał Bentkowski details a real-world exploitation of DOM Clobbering to achieve XSS in Gmail's AMP4Email feature.
  • The blog post "Go Go XSS Gadgets: Chaining a DOM Clobbering Exploit in the Wild" by Brett Buerhaus details how DOM Clobbering vulnerabilities can be chained to execute advanced XSS exploits.

Want to try out the gadgets?

We provide a website hosting Proof-of-Concept (PoC) pages for each DOM Clobbering gadget in our collection. To set it up locally, click here.

The following libraries accept user input and output content as type/html with certain named attributes (e.g., id or name) preserved at different levels of capability. Using these libraries may expose web applications to HTML injection risks. Libraries may directly insert user input into the DOM, or the web application may retrieve the user input from the library and then add it to the DOM.