Executive Summary

CVE-2026-39662 is a Broken Access Control vulnerability in the WordPress plugin "Product Price by Formula for WooCommerce" versions up to and including 2.5.6.

The issue arises from missing authorization, authentication, or nonce token checks within certain plugin functions, which allows unauthenticated users to perform actions that normally require higher privileges.

This flaw is categorized under the OWASP Top 10 category A1: Broken Access Control.

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Impact Analysis

This vulnerability allows unauthenticated users to perform privileged actions, potentially leading to unauthorized changes or access within the affected WooCommerce plugin.

Although the CVSS severity score is 5.3, indicating a low priority threat with limited impact, the vulnerability can be exploited in mass campaigns targeting many websites indiscriminately.

No official patch is currently available, so affected users should seek mitigation strategies such as updating the plugin when a fix is released or consulting their hosting provider or web developer.

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Mitigation Strategies

To mitigate the CVE-2026-39662 vulnerability in the Product Price by Formula for WooCommerce plugin, users should update the plugin once an official patch is released.

In the meantime, it is recommended to seek assistance from your hosting provider or web developer to implement rapid mitigation strategies to protect affected sites.

Since the vulnerability allows unauthenticated users to perform privileged actions due to missing authorization checks, restricting access to the plugin's functions or disabling the plugin temporarily may also reduce risk.

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Compliance Impact

The provided information does not specify any direct impact of the CVE-2026-39662 vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

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Detection Guidance

This vulnerability involves missing authorization checks in the Product Price by Formula for WooCommerce plugin up to version 2.5.6, allowing unauthenticated users to perform privileged actions. Detection typically involves identifying attempts to access or exploit plugin functions without proper authentication.

Since the vulnerability is related to broken access control in specific plugin functions, you can monitor your web server logs for unusual or unauthorized HTTP requests targeting endpoints related to the Product Price by Formula plugin.

Example commands to detect potential exploitation attempts include:

• Using grep to search web server access logs for suspicious requests to the plugin's paths or parameters: grep -i 'product-price-by-formula' /var/log/apache2/access.log
• Checking for POST requests that might attempt to exploit missing authorization: grep 'POST' /var/log/apache2/access.log | grep 'product-price-by-formula'
• Using tools like curl or Burp Suite to manually test access to plugin functions without authentication to verify if access control is missing.

Note that no official detection scripts or signatures are currently available, so monitoring for unusual access patterns and keeping the plugin updated when a patch is released is recommended.

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