CVE-2019-7861 Explained : Impact and Mitigation

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 vulnerability due to insufficient server-side validation of user input, potentially allowing attackers to bypass file upload restrictions.

Understanding CVE-2019-7861

What is CVE-2019-7861?

This CVE identifies a security issue in Magento 2 versions 2.1, 2.2, and 2.3 that could be exploited by attackers to circumvent file upload restrictions.

The Impact of CVE-2019-7861

The vulnerability could lead to unauthorized file uploads, potentially compromising the integrity and security of the affected Magento installations.

Technical Details of CVE-2019-7861

Vulnerability Description

Insufficient server-side validation of user input in Magento 2 versions 2.1, 2.2, and 2.3

Affected Systems and Versions

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

Attackers can exploit the lack of validation to bypass file upload restrictions

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
Review and restrict file upload permissions

Long-Term Security Practices

Implement strict input validation mechanisms on the server side
Regularly update Magento to the latest secure versions

Patching and Updates

Ensure timely installation of security patches and updates provided by Magento