CVE-2021-24640 : What You Need to Know

WordPress Slider Block Gutenslider plugin before version 5.2.0 is vulnerable to Stored Cross-Site Scripting (XSS) attacks that could be exploited by users with roles as low as contributors.

Understanding CVE-2021-24640

This CVE identifies a security flaw in the Gutenslider plugin for WordPress, allowing attackers to execute XSS attacks.

What is CVE-2021-24640?

The vulnerability in Gutenslider plugin version prior to 5.2.0 enables contributors to carry out XSS attacks due to unescaped minWidth attribute in a Gutenburg block.

The Impact of CVE-2021-24640

With this vulnerability, attackers can inject malicious scripts into the plugin, potentially compromising the security and integrity of the affected WordPress websites.

Technical Details of CVE-2021-24640

The following details explain the technical aspects of this CVE.

Vulnerability Description

The Gutenslider plugin fails to properly escape the minWidth attribute, leading to XSS attacks that can be triggered by contributors.

Affected Systems and Versions

WordPress Slider Block Gutenslider versions earlier than 5.2.0 are impacted by this vulnerability.

Exploitation Mechanism

By leveraging the unescaped minWidth attribute, contributors can insert harmful scripts into Gutenburg blocks, opening up opportunities for XSS attacks.

Mitigation and Prevention

To protect systems from CVE-2021-24640, consider the following mitigation strategies.

Immediate Steps to Take

Update the Gutenslider plugin to version 5.2.0 or later immediately.
Restrict user roles and permissions to prevent unauthorized access.

Long-Term Security Practices

Regularly monitor and audit WordPress plugins for security vulnerabilities.
Educate users on best practices to prevent XSS attacks.

Patching and Updates

Stay informed about security patches and updates released by the plugin developers to address vulnerabilities like CVE-2021-24640.