CVE-2023-0268 : Security Advisory and Response

This CVE, assigned by WPScan, pertains to a vulnerability in the Mega Addons For WPBakery Page Builder plugin, version less than 4.3.0, allowing for Stored Cross-Site Scripting attacks by users with the contributor role and above.

Understanding CVE-2023-0268

This section delves into the details, impact, technical aspects, and mitigation strategies related to CVE-2023-0268.

What is CVE-2023-0268?

The vulnerability in the Mega Addons For WPBakery Page Builder plugin before version 4.3.0 stems from inadequate validation and escaping of some shortcode attributes. This oversight enables users with the contributor role and higher to execute Stored Cross-Site Scripting attacks.

The Impact of CVE-2023-0268

Due to this vulnerability, malicious contributors and above can inject unauthorized scripts into pages or posts, potentially leading to unauthorized actions, data theft, or further exploitation of the affected WordPress websites.

Technical Details of CVE-2023-0268

To better understand this CVE, let's explore its technical specifics, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The issue arises from the plugin's failure to properly validate and escape certain shortcode attributes before presenting them on a page or post where the shortcode is inserted. This oversight opens the door for contributors and higher roles to execute Stored Cross-Site Scripting attacks.

Affected Systems and Versions

The vulnerability impacts the Mega Addons For WPBakery Page Builder plugin with a version less than 4.3.0. Users utilizing versions before this are susceptible to exploit by users with contributor privileges or above.

Exploitation Mechanism

By leveraging the inadequate validation and escaping of shortcode attributes, malicious users with the contributor role and beyond can insert harmful scripts into pages or posts, which are executed when accessed by site visitors, leading to XSS attacks.

Mitigation and Prevention

Protecting your WordPress site from CVE-2023-0268 involves taking immediate steps, implementing long-term security practices, and ensuring timely patching and updates.

Immediate Steps to Take

Disable or remove the Mega Addons For WPBakery Page Builder plugin if you are using a version prior to 4.3.0.
Monitor closely for any unusual or suspicious activities on your WordPress site, especially in areas where contributors can add content.

Long-Term Security Practices

Regularly update all plugins and themes to the latest versions to patch vulnerabilities.
Educate users with contributor roles and above about safe practices to prevent XSS attacks.
Consider implementing a Web Application Firewall (WAF) to add an extra layer of protection against such security risks.

Patching and Updates

Ensure that the Mega Addons For WPBakery Page Builder plugin is updated to version 4.3.0 or higher to mitigate the vulnerability and prevent potential Stored Cross-Site Scripting attacks. Regularly check for updates and apply them promptly to safeguard your WordPress site from known security issues.