Unauthenticated Path Traversal in W3 Total Cache

Executive Summary

This is an unauthenticated path traversal vulnerability in the W3 Total Cache WordPress plugin versions 2.10.2 and below. It allows attackers to access files outside the intended directory structure without authentication.

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Detection Guidance

Check if the W3 Total Cache plugin version is 2.10.2 or below. Look for unusual file access patterns or requests containing path traversal sequences like '../' in web server logs.

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Impact Analysis

Attackers could exploit this to compromise websites, potentially leading to unauthorized access, data theft, or website defacement. It may affect thousands of sites regardless of size or popularity.

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Mitigation Strategies

Update the W3 Total Cache plugin to version 2.10.3 or later. If updating is not possible, apply the Patchstack mitigation rule to block attacks until an update is available.

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