CVE-2023-6558 : Security Advisory and Response

This is a detailed overview of CVE-2023-6558 to help you understand the impact, technical details, and mitigation strategies related to this vulnerability.

Understanding CVE-2023-6558

CVE-2023-6558 is a security vulnerability found in the Export and Import Users and Customers plugin for WordPress, allowing for arbitrary file uploads due to insufficient file type validation on the 'upload_import_file' function. This vulnerability exists in versions up to and including 2.4.8, potentially enabling authenticated attackers with shop manager-level capabilities or above to upload arbitrary files onto the affected site's server, thus leading to possible remote code execution.

What is CVE-2023-6558?

The CVE-2023-6558 vulnerability is classified under CWE-434 - Unrestricted Upload of File with Dangerous Type, indicating the risk associated with the ability to upload malicious files.

The Impact of CVE-2023-6558

The impact of CVE-2023-6558 is rated as HIGH with a base score of 7.2 according to the CVSSv3.1 metrics. This signifies a significant threat level that could result in compromised system integrity, confidentiality, and availability.

Technical Details of CVE-2023-6558

The technical details of this CVE include:

Vulnerability Description

The vulnerability in the Export and Import Users and Customers plugin for WordPress arises from inadequate validation of file types, leading to the potential for arbitrary file uploads and subsequent unauthorized access or code execution.

Affected Systems and Versions

The affected system includes any installation of the Export and Import Users and Customers plugin for WordPress up to version 2.4.8. Users with versions equal to or less than 2.4.8 are susceptible to exploitation.

Exploitation Mechanism

Exploiting CVE-2023-6558 involves leveraging the lack of proper file type validation in the 'upload_import_file' function of the plugin, allowing attackers with specific user permissions to upload malicious files and potentially execute remote code.

Mitigation and Prevention

To safeguard your systems from the CVE-2023-6558 vulnerability, consider the following mitigation measures:

Immediate Steps to Take

Update the Export and Import Users and Customers plugin to a secure version that addresses the vulnerability.
Monitor for any suspicious file uploads or unexpected system behavior that may indicate exploitation.

Long-Term Security Practices

Regularly audit plugins and extensions for security vulnerabilities and update them promptly.
Implement principle of least privilege to limit user capabilities and access levels.

Patching and Updates

Ensure that your WordPress plugins, including Export and Import Users and Customers, are regularly updated to the latest secure versions to mitigate known vulnerabilities and enhance overall system security.