CVE-2021-4391 Explained : Impact and Mitigation

This article provides details about CVE-2021-4391, a vulnerability found in the Ultimate Gift Cards for WooCommerce WordPress plugin that can lead to Cross-Site Request Forgery attacks.

Understanding CVE-2021-4391

This section discusses the impact, technical details, and mitigation strategies related to CVE-2021-4391.

What is CVE-2021-4391?

The Ultimate Gift Cards for WooCommerce plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.1.1. The issue arises from the missing or incorrect nonce validation on the

mwb_wgm_save_post()

function, allowing unauthenticated attackers to manipulate product gift card details through a forged request.

The Impact of CVE-2021-4391

The vulnerability could enable attackers to modify gift card information on affected websites if they can deceive a site administrator into taking specific actions, such as clicking on a malicious link.

Technical Details of CVE-2021-4391

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

Vulnerability Description

The Cross-Site Request Forgery (CSRF) vulnerability in the Ultimate Gift Cards for WooCommerce plugin arises from inadequate nonce validation in version 2.1.1 and below, allowing unauthorized parties to alter gift card data.

Affected Systems and Versions

The vulnerability affects versions up to 2.1.1 of the Ultimate Gift Cards for WooCommerce plugin within WordPress installations.

Exploitation Mechanism

By exploiting the missing nonce validation, malicious actors can craft forged requests to manipulate product gift card details on vulnerable sites.

Mitigation and Prevention

This section highlights the immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

Site administrators should urgently update the Ultimate Gift Cards for WooCommerce plugin to version 2.1.2 or later to mitigate the CSRF risk. They should also educate users about the dangers of clicking on unsolicited links.

Long-Term Security Practices

To enhance website security, follow best practices such as implementing regular security audits, monitoring for suspicious activities, and training staff on cybersecurity awareness.

Patching and Updates

Always prioritize installing security patches and updates for plugins, themes, and the WordPress core to address known vulnerabilities and enhance overall site security.