Executive Summary

The App Builder – Create Native Android & iOS Apps On The Flight plugin for WordPress has a privilege escalation vulnerability in all versions up to and including 5.5.10. This occurs because the function verify_role() in the AuthTrails.php file explicitly whitelists the wcfm_vendor role along with subscriber and customer roles. When a new user is created via wp_insert_user(), the wcfm_vendor role is assigned directly without going through the WCFM Marketplace's vendor approval workflow.

As a result, an unauthenticated attacker can register an account with the wcfm_vendor role by supplying the role parameter in the /wp-json/app-builder/v1/register REST API endpoint. This bypasses the normal vendor approval process and immediately grants the attacker vendor-level privileges such as product management, order access, and store management on sites using WCFM Marketplace.

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Impact Analysis

This vulnerability allows an unauthenticated attacker to gain vendor-level privileges on a WordPress site using the affected plugin and WCFM Marketplace. The attacker can manage products, access orders, and control store settings without approval.

Such unauthorized access can lead to unauthorized changes to product listings, manipulation of orders, potential data exposure, and disruption of normal store operations, which can harm the business and its customers.

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Compliance Impact

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Detection Guidance

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Mitigation Strategies

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