CVE-2021-24969 : Exploit Details and Defense Strategies

WordPress Download Manager plugin before version 3.2.22 is affected by a Stored Cross-Site Scripting vulnerability that allows authenticated users to execute XSS attacks. Here's what you need to know about CVE-2021-24969.

Understanding CVE-2021-24969

This CVE refers to a security issue in the WordPress Download Manager plugin that could enable Cross-Site Scripting attacks by authenticated users such as subscribers.

What is CVE-2021-24969?

The vulnerability in the WordPress Download Manager plugin allows attackers to execute malicious scripts through unvalidated Template data on various pages like the admin dashboard and frontend, exploiting the lack of authorization and CSRF checks in the wpdm_save_template AJAX action.

The Impact of CVE-2021-24969

Due to this vulnerability, attackers with subscriber access can inject and execute arbitrary scripts on affected WordPress sites, potentially leading to account hijacking, fraud, or site defacement.

Technical Details of CVE-2021-24969

This section provides key technical details about the vulnerability.

Vulnerability Description

The WordPress Download Manager plugin fails to sanitize Template data before outputting, leaving it vulnerable to Cross-Site Scripting attacks. The absence of proper authorisation and CSRF checks further exacerbates the risk.

Affected Systems and Versions

The vulnerability impacts WordPress Download Manager plugin versions older than 3.2.22.

Exploitation Mechanism

Authenticated users, including subscribers, can leverage the wpdm_save_template AJAX action to execute malicious scripts on compromised WordPress sites.

Mitigation and Prevention

To safeguard your WordPress site from CVE-2021-24969, follow these mitigation steps:

Immediate Steps to Take

Update the WordPress Download Manager plugin to version 3.2.22 or newer to patch the vulnerability.
Regularly monitor for any suspicious activities on your site.

Long-Term Security Practices

Implement strict access controls to limit user privileges and prevent unauthorized access.
Educate users on recognizing and avoiding social engineering attacks.

Patching and Updates

Always apply security patches promptly and stay informed about the latest security advisories to protect your WordPress site from potential threats.