Mavo, DOM Clobbering Vulnerability, CVE-2025-XXXX (Moderate)

How the CVE Works:

The CVE-2025-XXXX vulnerability in Mavo v0.3.2 is a DOM Clobbering issue that allows attackers to inject malicious HTML elements into a web page. DOM Clobbering occurs when an attacker manipulates the Document Object Model (DOM) by injecting elements that override existing JavaScript variables or functions. In this case, the vulnerability arises due to insufficient sanitization of user-supplied HTML inputs. When a crafted HTML element is injected, it can overwrite critical JavaScript objects or functions, leading to arbitrary code execution. This can compromise the integrity of the application, allowing attackers to perform unauthorized actions or steal sensitive data.

DailyCVE Form:

Platform: Mavo
Version: 0.3.2
Vulnerability: DOM Clobbering
Severity: Moderate
Date: Mar 3, 2025

What Undercode Say:

Exploitation:

1. Craft Malicious HTML: Create an HTML payload that overrides critical JavaScript objects.

   </li>
   </ol>
   
   <form id="prototype"></form>
   
   <img name="toString"></img>
   

   2. Inject Payload: Deliver the payload via user input fields or URL parameters.
   3. Trigger Execution: The payload overrides JavaScript functions, leading to arbitrary code execution.

   Protection:

   1. Sanitize Inputs: Use libraries like DOMPurify to sanitize user inputs.

      import DOMPurify from 'dompurify';
      const cleanHTML = DOMPurify.sanitize(userInput);
      

   2. Content Security Policy (CSP): Implement a strict CSP to prevent unauthorized script execution.
      [http]
      Content-Security-Policy: default-src ‘self’; script-src ‘self’;
      [/http]
   3. Avoid Global Variables: Minimize the use of global variables in JavaScript to reduce attack surface.
   4. Update Libraries: Ensure Mavo and related dependencies are updated to the latest secure versions.

   Analytics:

   • Impact: Moderate, as it requires user interaction but can lead to significant compromise.
   • Exploitability: Medium, due to the need for crafted user input.
   • Affected Systems: Websites using Mavo v0.3.2 or earlier.

   Commands:

   • Check Version: Verify the installed version of Mavo.

     npm list mavo
     

   • Update Mavo: Upgrade to a patched version.

     npm install mavo@latest
     

   References:

   • GitHub Advisory Database
   • National Vulnerability Database
   • DOMPurify Documentation

   By following these steps, developers can mitigate the risks associated with this DOM Clobbering vulnerability and protect their applications from potential exploitation.

   References:

   Reported By: https://github.com/advisories/GHSA-3mf5-r4hg-hfx9
   Extra Source Hub:
   Undercode

   Image Source:

   Undercode AI DI v2