CVE-2019-8139 : Exploit Details and Defense Strategies

Magento versions 2.3 prior to 2.3.3 or 2.3.2-p1 have a stored cross-site scripting (XSS) vulnerability that allows authenticated users to inject malicious Javascript code.

Understanding CVE-2019-8139

What is CVE-2019-8139?

This CVE refers to a stored cross-site scripting vulnerability in Magento 2 versions 2.3 prior to 2.3.3 or 2.3.2-p1. It enables authenticated users to insert their own Javascript code into the dynamic block while using the page builder feature on a product.

The Impact of CVE-2019-8139

This vulnerability could be exploited by attackers to execute arbitrary code in the context of the user's browser session, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2019-8139

Vulnerability Description

The vulnerability allows authenticated users to perform stored cross-site scripting attacks by injecting malicious Javascript code into the dynamic block when utilizing the page builder feature.

Affected Systems and Versions

Product: Magento 2
Vendor: Adobe Systems Incorporated
Versions Affected: Magento 2.3 prior to 2.3.3 or 2.3.2-p1

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging an authenticated user account to insert malicious Javascript code into the dynamic block while using the page builder feature on a product.

Mitigation and Prevention

Immediate Steps to Take

Apply the security patch provided by Magento to fix the vulnerability.
Educate users about the risks of executing arbitrary code on websites.

Long-Term Security Practices

Regularly update Magento installations to the latest secure versions.
Implement security best practices to prevent XSS attacks.

Patching and Updates

Install the security update released by Magento to address the XSS vulnerability.