Executive Summary

CVE-2026-39689 is a Broken Access Control vulnerability in the WordPress eShipper Commerce Plugin versions up to and including 2.16.12. It involves missing authorization, authentication, or nonce token checks within certain plugin functions. This flaw allows unauthenticated users to perform actions that normally require higher privileges.

The vulnerability falls under the OWASP Top 10 category A1: Broken Access Control and has a CVSS severity score of 5.3, indicating a low priority threat with limited impact.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability allows unauthenticated users to perform privileged actions within the eShipper Commerce plugin, potentially leading to unauthorized access or manipulation of the website's commerce functions.

Although the CVSS score is relatively low (5.3), the vulnerability can be exploited in mass-exploit campaigns targeting many websites indiscriminately, increasing the risk of widespread impact.

No official patch is currently available, so immediate mitigation involves updating the plugin or seeking assistance from hosting providers or web developers.

Useful 0 Not Useful 0

Detection Guidance

The vulnerability involves missing authorization, authentication, or nonce token checks within certain plugin functions of the eShipper Commerce Plugin up to version 2.16.12. Detection would involve checking for unauthorized access attempts or unusual activity targeting these plugin functions.

Since no official patch or specific detection commands are provided, it is recommended to monitor web server logs for suspicious requests to the eShipper Commerce plugin endpoints that should require authentication.

Example commands to help detect suspicious activity could include searching web server logs for access attempts to the plugin paths without valid authentication tokens, for instance using grep:

• grep -i 'eshipper-commerce' /var/log/apache2/access.log | grep -v 'authenticated_user_identifier'
• grep -i 'eshipper-commerce' /var/log/nginx/access.log | grep -v 'authenticated_user_identifier'

Replace 'authenticated_user_identifier' with the actual token or session identifier used by your system to distinguish authenticated users.

Useful 0 Not Useful 0

Compliance Impact

The vulnerability involves missing authorization and broken access control, which can allow unauthorized users to perform privileged actions. Such security weaknesses can potentially lead to unauthorized access to sensitive data or systems.

While the CVE description and resources do not explicitly mention compliance with standards like GDPR or HIPAA, broken access control vulnerabilities generally pose risks to data confidentiality and integrity, which are critical requirements under these regulations.

Therefore, if exploited, this vulnerability could negatively impact compliance with regulations that mandate strict access controls and protection of personal or sensitive data.

Useful 0 Not Useful 0

Mitigation Strategies

Immediate mitigation involves updating the eShipper Commerce Plugin to a version later than 2.16.12 if such an update becomes available.

If updating is not feasible at this time, users are advised to seek assistance from their hosting provider or web developer to implement temporary access controls or restrictions to limit unauthorized access.

Additionally, monitoring and restricting access to the affected plugin endpoints and applying web application firewall (WAF) rules to block suspicious requests can help reduce risk.

Useful 0 Not Useful 0