CVE-2020-11516 Explained : Impact and Mitigation

Stored XSS vulnerability in the Contact Form 7 Datepicker plugin through version 2.6.0 for WordPress allows attackers to execute arbitrary JavaScript via the plugin's settings, potentially leading to unauthorized actions.

Understanding CVE-2020-11516

This CVE involves a Stored XSS vulnerability in a popular WordPress plugin, Contact Form 7 Datepicker, allowing attackers to inject and execute malicious JavaScript code.

What is CVE-2020-11516?

The vulnerability enables authenticated attackers with limited permissions to insert harmful JavaScript into the plugin's settings, which can be triggered when an administrator interacts with a contact form, leading to potential security breaches.

The Impact of CVE-2020-11516

The exploit could result in the execution of unauthorized actions within the administrator's session, such as creating new administrative users or performing malicious activities.

Technical Details of CVE-2020-11516

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The flaw allows authenticated attackers to save arbitrary JavaScript through the unprotected wp_ajax_cf7dp_save_settings AJAX action and the ui_theme parameter.

Affected Systems and Versions

Product: Contact Form 7 Datepicker plugin
Vendor: WordPress
Versions affected: up to 2.6.0

Exploitation Mechanism

Attackers with minimal permissions can exploit the vulnerability by injecting malicious JavaScript into the plugin's settings, which is executed when an administrator interacts with a contact form.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the Contact Form 7 Datepicker plugin to the latest secure version.
Monitor and restrict access to the plugin's settings to authorized users only.

Long-Term Security Practices

Regularly audit and review plugins for security vulnerabilities.
Educate users on safe practices to prevent XSS attacks.

Patching and Updates

Ensure timely installation of security patches and updates to mitigate the risk of exploitation.