CVE-2021-24541 Explained : Impact and Mitigation

This article provides an overview of CVE-2021-24541, a vulnerability associated with the Wonder PDF Embed WordPress plugin.

Understanding CVE-2021-24541

In this section, we will discuss what CVE-2021-24541 is and its impact.

What is CVE-2021-24541?

The Wonder PDF Embed WordPress plugin before version 1.7 is susceptible to Stored Cross-Site Scripting (XSS) attacks due to inadequate parameter escaping within its wonderplugin_pdf shortcode. This vulnerability enables users with low role permissions like Contributor to execute malicious scripts.

The Impact of CVE-2021-24541

As users with privileges as low as Contributor can exploit this vulnerability, the security of the WordPress site using the Wonder PDF Embed plugin is compromised. Attackers can inject harmful scripts that affect the site's performance and integrity.

Technical Details of CVE-2021-24541

In this section, we will delve into the technical aspects of CVE-2021-24541.

Vulnerability Description

The vulnerability arises from the lack of proper sanitization of parameters in the wonderplugin_pdf shortcode, allowing attackers to insert malicious scripts.

Affected Systems and Versions

The Wonder PDF Embed plugin versions prior to 1.7 are impacted by this vulnerability.

Exploitation Mechanism

Attackers can craft PDF files containing malicious scripts and upload them using the compromised wonderplugin_pdf shortcode, triggering XSS attacks.

Mitigation and Prevention

To address and prevent CVE-2021-24541, the following steps can be taken:

Immediate Steps to Take

Site administrators should update the Wonder PDF Embed plugin to version 1.7 or higher and thoroughly sanitize user inputs to prevent XSS attacks.

Long-Term Security Practices

Regularly monitor for plugin updates and security advisories to stay current with vulnerability patches and ensure timely implementation.

Patching and Updates

Promptly apply security patches provided by plugin developers to mitigate the risk of XSS vulnerabilities.