CVE-2022-2438 : Security Advisory and Response

WordPress Broken Link Checker plugin up to version 1.11.16 is vulnerable to deserialization of untrusted input, allowing attackers to call files using a PHAR wrapper and perform malicious actions.

Understanding CVE-2022-2438

This CVE details a vulnerability in the Broken Link Checker plugin for WordPress that could be exploited by authenticated attackers with administrative privileges.

What is CVE-2022-2438?

The Broken Link Checker plugin in WordPress has a vulnerability that allows attackers to deserialize untrusted data through the '$log_file' value, potentially leading to arbitrary PHP object calls and malicious actions.

The Impact of CVE-2022-2438

Attackers with administrative privileges can upload a file with a serialized payload, triggering a chain of potentially harmful actions. This vulnerability poses a high risk to the security of websites using the affected plugin.

Technical Details of CVE-2022-2438

This section outlines the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability in the Broken Link Checker plugin allows for the deserialization of untrusted input, enabling attackers to execute arbitrary PHP objects.

Affected Systems and Versions

The issue affects versions of the plugin up to and including 1.11.16, putting WordPress websites with this plugin installed at risk.

Exploitation Mechanism

Authenticated attackers with administrative privileges can exploit the vulnerability by uploading a file with a serialized payload through the '$log_file' value.

Mitigation and Prevention

It's crucial to take immediate steps to secure your WordPress website and prevent potential exploitation through this vulnerability.

Immediate Steps to Take

Website administrators should update the Broken Link Checker plugin to a patched version, if available, to mitigate the risk of exploitation.

Long-Term Security Practices

Regularly update all plugins and themes on your WordPress site, maintain strong password policies, and monitor for any suspicious activity.

Patching and Updates

Stay informed about security updates for the Broken Link Checker plugin and apply patches promptly to address known vulnerabilities.