CVE-2021-27910 : What You Need to Know

A Stored XSS vulnerability on the Bounce Management Callback function in Mautic allows attackers to inject arbitrary JavaScript code leading to potential information theft or tampering.

Understanding CVE-2021-27910

This CVE refers to a vulnerability in Mautic that enables attackers to perform arbitrary JavaScript Injection.

What is CVE-2021-27910?

The vulnerability arises from insufficient sanitization/filtering in Mautic's bounce management callback function, allowing attackers to inject JavaScript code via specific POST request parameters.

The Impact of CVE-2021-27910

The severity is rated as HIGH with a base CVSS score of 8.2 due to the potential execution of arbitrary code leading to information theft or alteration.

Technical Details of CVE-2021-27910

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability allows unauthorized JavaScript injection through POST request parameters, exploiting Mautic's bounce management callback function.

Affected Systems and Versions

Versions less than 3.3.4 and 4.0.0 of Mautic are affected by this vulnerability.

Exploitation Mechanism

Attackers can inject JavaScript code into specific POST request parameters, stored persistently and executed when authenticated users view lead details.

Mitigation and Prevention

Discover how to address and prevent the CVE-2021-27910 vulnerability.

Immediate Steps to Take

Users should update Mautic to versions 3.3.4 or above to mitigate the risk of exploitation.

Long-Term Security Practices

Implement robust input sanitization and validate user inputs to prevent future security breaches.

Patching and Updates

Regularly apply security patches and updates released by Mautic to safeguard against known vulnerabilities.