CVE-2019-6726 Explained : Impact and Mitigation

WordPress Fastest Cache plugin versions up to 0.8.9.0 are vulnerable to remote attacks due to improper handling of directory traversal sequences.

Understanding CVE-2019-6726

This CVE involves a vulnerability in the WP Fastest Cache plugin for WordPress that allows remote attackers to delete arbitrary files by exploiting directory traversal sequences.

What is CVE-2019-6726?

The vulnerability in the WP Fastest Cache plugin versions up to 0.8.9.0 for WordPress enables attackers to manipulate the HTTP Referer header, leading to potential file deletions.

The Impact of CVE-2019-6726

Remote attackers can exploit the vulnerability to delete arbitrary files on affected systems.

Technical Details of CVE-2019-6726

The technical aspects of the CVE-2019-6726 vulnerability are as follows:

Vulnerability Description

Attackers can abuse the wp_postratings_clear_fastest_cache and rm_folder_recursively functions in wpFastestCache.php due to mishandling of directory traversal sequences.

Affected Systems and Versions

WP Fastest Cache plugin versions up to 0.8.9.0 for WordPress are affected by this vulnerability.

Exploitation Mechanism

By manipulating the HTTP Referer header and exploiting the improper handling of directory traversal sequences (../), attackers can potentially delete arbitrary files.

Mitigation and Prevention

To address CVE-2019-6726, consider the following mitigation strategies:

Immediate Steps to Take

Update the WP Fastest Cache plugin to the latest version to patch the vulnerability.
Monitor and restrict HTTP Referer headers to prevent manipulation.

Long-Term Security Practices

Regularly update all plugins and themes to ensure the latest security patches are applied.
Implement strict file permission settings to limit unauthorized access to files.

Patching and Updates

Stay informed about security advisories and promptly apply patches released by plugin developers to mitigate known vulnerabilities.