CVE-2021-3120 : What You Need to Know

This CVE-2021-3120 article provides details about an arbitrary file upload vulnerability in the YITH WooCommerce Gift Cards Premium plugin for WordPress, allowing remote code execution.

Understanding CVE-2021-3120

This section will cover the impacts, technical details, and mitigation strategies related to CVE-2021-3120.

What is CVE-2021-3120?

CVE-2021-3120 is an arbitrary file upload vulnerability in the YITH WooCommerce Gift Cards Premium plugin for WordPress before version 3.3.1. Attackers can exploit this flaw to achieve remote code execution by uploading a file onto the web server.

The Impact of CVE-2021-3120

The vulnerability poses a critical threat with a CVSS base score of 9.8. It allows remote attackers to execute arbitrary code on the system in the web server's context, leading to high impacts on confidentiality, integrity, and availability.

Technical Details of CVE-2021-3120

This section delves into the vulnerability description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The vulnerability stems from improper handling of file uploads. Attackers can upload malicious files with PHP extensions, leading to arbitrary code execution on the server.

Affected Systems and Versions

The YITH WooCommerce Gift Cards Premium plugin versions before 3.3.1 are affected by this vulnerability. Users with these versions are at risk of exploitation.

Exploitation Mechanism

Attackers can exploit the flaw by placing a valid Gift Card product into the shopping cart and uploading a file with a user-specified filename and extension onto the web server.

Mitigation and Prevention

In this section, you will find actionable steps to mitigate the risk posed by CVE-2021-3120.

Immediate Steps to Take

Users should update the YITH WooCommerce Gift Cards Premium plugin to version 3.3.1 or higher to patch the vulnerability. It is crucial to restrict file upload permissions and monitor for any suspicious activities.

Long-Term Security Practices

Implement secure coding practices to prevent arbitrary file uploads. Regular security audits and code reviews can help identify and address similar vulnerabilities.

Patching and Updates

Stay vigilant for security updates from plugin vendors and promptly apply patches to ensure the protection of your systems.