W3 Total Cache Plugin File Upload Path Traversal

Executive Summary

This vulnerability is a path traversal flaw in the W3 Total Cache WordPress plugin before version 2.10.6. It allows users with Author role or higher to exploit the CDN media library import feature to copy arbitrary server-readable files into publicly accessible directories. The issue bypasses document root restrictions and file-type checks, exposing sensitive files to unauthenticated retrieval when an administrator runs the import process.

Useful 0 Not Useful 0

Detection Guidance

Check if the W3 Total Cache plugin version is below 2.10.6. Look for unauthorized files in publicly accessible directories, especially those recently modified or with unusual names. Review server logs for suspicious import requests or file access patterns.

Useful 0 Not Useful 0

Impact Analysis

If exploited, this vulnerability could allow attackers to access sensitive files on your server, such as configuration files, logs, or other confidential data. This could lead to data breaches, unauthorized access to user information, or further compromise of your WordPress site or server.

Useful 0 Not Useful 0

Compliance Impact

This vulnerability could lead to non-compliance with GDPR or HIPAA if it results in unauthorized access to personal or health data. GDPR requires protecting personal data, while HIPAA mandates safeguarding protected health information. A breach could result in legal penalties, fines, or reputational damage.

Useful 0 Not Useful 0

Mitigation Strategies

Update the W3 Total Cache plugin to version 2.10.6 or later immediately. Remove any unauthorized files found in public directories. Restrict Author role permissions to only necessary functions. Monitor network traffic for unusual file retrieval attempts.

Useful 0 Not Useful 0