CVE-2026-86812 in WPCafe Plugin
Summary
by MITRE • 09/11/2026
The WPCafe WordPress plugin before 3.0.18 does not correctly restrict access to a set of order-management REST endpoints because their permission callbacks return an incorrect type on failure, allowing unauthenticated users to disclose guest order information and to change the status of, or trash, any order.
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Analysis
by VulDB Data Team • 09/11/2026
The vulnerability identified in WPCafe versions prior to 3.0.18 represents a critical authentication bypass within the WordPress REST API infrastructure. The core issue stems from an improper implementation of permission callbacks for specific order-management endpoints. In standard WordPress development practices, these callbacks are designed to return a boolean value or a WP_Error object indicating whether access is granted or denied. However, in this instance, the callback fails to correctly restrict access because it returns an incorrect type upon failure. This technical flaw effectively neutralizes the security check mechanism intended by the plugin developers, as WordPress interprets certain non-falsey values as permission grants even when authentication credentials are absent or invalid.
This misconfiguration allows unauthenticated actors to interact with sensitive administrative functions without any form of verification. Specifically, attackers can exploit these endpoints to disclose guest order information, which may include personally identifiable information such as names, contact details, and purchase history. Furthermore, the vulnerability extends beyond mere data disclosure, enabling unauthorized modification of order statuses or the deletion of orders entirely by trashing them. This capability undermines the integrity of the e-commerce workflow, potentially leading to significant operational disruptions for business owners who rely on accurate order tracking and management systems.
From a classification perspective, this flaw aligns with CWE-285, which describes Improper Authorization vulnerabilities where access controls are not enforced correctly. The exploitation technique mirrors tactics found in the MITRE ATT&CK framework under T1078, specifically Valid Accounts or Default Accounts if default credentials were involved, but more accurately fits within unauthorized API access patterns often associated with broken object level authorization (BOLA) principles adapted for RESTful services. Attackers can leverage automated tools to iterate through order IDs and extract data or manipulate records systematically, posing a severe risk to both customer privacy and business continuity.
To mitigate this vulnerability, immediate action is required by upgrading the WPCafe plugin to version 3.0.18 or later, where these permission callbacks have been corrected to properly enforce access restrictions. Administrators should also audit their WordPress installations for any other plugins that utilize custom REST endpoints with similar callback implementations to ensure no analogous weaknesses exist within their environment. Regular security audits and the use of web application firewalls can provide additional layers of defense by monitoring for anomalous API requests originating from unauthenticated sources, thereby reducing the window of exposure during potential exploitation attempts.