CVE-2019-7939 : Exploit Details and Defense Strategies

Magento 2 versions 2.1 prior to 2.1.18, 2.2 prior to 2.2.9, and 2.3 prior to 2.3.2 are affected by a reflected cross-site scripting (XSS) vulnerability on the customer cart checkout page.

Understanding CVE-2019-7939

This CVE identifies a security vulnerability in Magento 2 that could allow an attacker to execute malicious scripts in a victim's browser.

What is CVE-2019-7939?

A reflected cross-site scripting vulnerability exists in Magento 2 versions 2.1 prior to 2.1.18, 2.2 prior to 2.2.9, and 2.3 prior to 2.3.2, potentially leading to the execution of malicious JavaScript code in a victim's browser.

The Impact of CVE-2019-7939

This vulnerability could be exploited by sending a victim a specially crafted URL, enabling the attacker to execute arbitrary JavaScript code in the victim's browser.

Technical Details of CVE-2019-7939

Vulnerability Description

The customer cart checkout page of Magento versions 2.1 prior to 2.1.18, 2.2 prior to 2.2.9, and 2.3 prior to 2.3.2 contains a vulnerability related to reflected cross-site scripting (XSS).

Affected Systems and Versions

Product: Magento 2
Versions Affected: Magento 2.1 prior to 2.1.18, Magento 2.2 prior to 2.2.9, Magento 2.3 prior to 2.3.2

Exploitation Mechanism

The vulnerability can be exploited by sending the target a specifically manipulated URL, triggering the execution of malicious JavaScript code in the target's web browser.

Mitigation and Prevention

Immediate Steps to Take

Apply the security patch provided by Magento for versions 2.1.18, 2.2.9, and 2.3.2.
Educate users to avoid clicking on suspicious links or visiting untrusted websites.

Long-Term Security Practices

Regularly update Magento to the latest version to ensure all security patches are applied.
Implement web application firewalls to detect and block malicious traffic.

Patching and Updates

Ensure timely installation of security patches and updates provided by Magento to address known vulnerabilities.