Path Traversal in Groundhogg WordPress Plugin

Executive Summary

CVE-2026-57389 is a vulnerability in the WordPress Groundhogg Plugin versions 4.4.1 and below that allows an attacker to perform arbitrary file deletion on the affected website.

This vulnerability is caused by improper limitation of a pathname to a restricted directory, also known as a Path Traversal issue, which enables attackers to delete files they should not have access to.

The vulnerability falls under the OWASP Top 10 category of Broken Access Control.

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Detection Guidance

The provided context does not include specific detection methods or commands for identifying the Path Traversal vulnerability (CVE-2026-57389) in the Groundhogg plugin on your network or system. However, general approaches to detect such vulnerabilities may include:

• Checking the installed version of the Groundhogg plugin on your WordPress site. If the version is 4.4.1 or below, the system is vulnerable. You can verify the version by navigating to the WordPress admin dashboard, then to 'Plugins', and locating the Groundhogg plugin.
• Using a web application vulnerability scanner (e.g., OWASP ZAP, Burp Suite, or Nessus) to scan for Path Traversal vulnerabilities. These tools can automate the detection process by sending crafted requests to identify improper pathname limitations.
• Monitoring web server logs for unusual access patterns, such as repeated requests containing '../' sequences or other path traversal payloads, which may indicate exploitation attempts.
• Reviewing file integrity by checking for unexpected file deletions or modifications, as this vulnerability could lead to arbitrary file deletion (as noted in Resource 1).

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Impact Analysis

An attacker exploiting this vulnerability could delete files from your website, which may cause the site to break or stop functioning properly.

Since the vulnerability has a high CVSS score of 8.6, it represents a serious risk that could lead to significant disruption of your website's availability.

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Compliance Impact

The vulnerability CVE-2026-57389, which allows arbitrary file deletion via path traversal, can have significant implications for compliance with standards and regulations like GDPR and HIPAA. Below are the potential impacts:

• GDPR (General Data Protection Regulation): If the deleted files contain personal data of EU citizens, the unauthorized deletion could violate GDPR's data integrity and confidentiality principles (Article 5(1)(f)). Additionally, if the deletion leads to a data breach, organizations may fail to meet the 72-hour breach notification requirement (Article 33).
• HIPAA (Health Insurance Portability and Accountability Act): For organizations handling protected health information (PHI), unauthorized file deletion could result in the loss of critical patient data, violating the HIPAA Security Rule's requirements for data integrity (45 CFR § 164.306(a)(1)) and availability (45 CFR § 164.308(a)(7)). This could lead to non-compliance penalties.
• Operational Disruptions: The arbitrary deletion of files may disrupt business operations, leading to non-compliance with industry-specific regulations that mandate system availability and data retention (e.g., SOX for financial data).
• Audit and Accountability: Both GDPR and HIPAA require organizations to maintain logs and audit trails. If files are deleted maliciously, it may hinder the ability to demonstrate compliance during audits or investigations.

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Mitigation Strategies

Immediate action is advised to mitigate this vulnerability.

• Update the WordPress Groundhogg Plugin to version 4.5 or later, as this version contains the patch for the vulnerability.
• Apply the mitigation rule provided by Patchstack to block attacks until the update can be applied.

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