CVE-2026-85306 in MountDev AI MCP Connector Plugin
Summary
by MITRE • 09/03/2026
Missing Authorization vulnerability in Cascadia Web Services MountDev AI MCP Connector for WordPress allows Exploiting Incorrectly Configured Access Control Security Levels.
This issue affects MountDev AI MCP Connector for WordPress: from n/a through 1.6.5.
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Analysis
by VulDB Data Team • 09/03/2026
The identified security flaw resides within the Cascadia Web Services MountDev AI MCP Connector plugin for WordPress, specifically affecting versions ranging from non-existent initial releases up to version 1.6.5. This vulnerability is classified as a missing authorization issue, which fundamentally represents an improper implementation of access control mechanisms that allow unauthenticated or unauthorized actors to perform sensitive operations. In the context of web application security, this type of flaw indicates that the software fails to adequately verify whether the requesting user has the necessary privileges before executing administrative functions or accessing protected resources. The core technical deficiency lies in the absence of robust server-side checks for session validity and role-based permissions when handling requests directed at specific endpoints within the plugin's architecture. Consequently, any individual with network connectivity to the WordPress installation can interact with these unprotected interfaces without needing valid credentials or a legitimate user session.
From a technical perspective, this vulnerability aligns closely with CWE-284, which describes Improper Access Control, and more specifically CWE-862, Missing Authorization. The operational impact of such a flaw is severe because it effectively bypasses the authentication layer entirely for certain functionalities exposed by the plugin. Attackers can exploit this gap to execute arbitrary commands, manipulate database entries, or access sensitive configuration data that should be restricted to administrators only. In many cases involving WordPress plugins with AI integration features like MCP connectors, these endpoints may allow interaction with external APIs or internal system states, thereby expanding the attack surface significantly. If an attacker successfully exploits this missing authorization check, they could potentially gain full administrative control over the compromised website, leading to data exfiltration, defacement, or the use of the server as a pivot point for further network intrusions.
This vulnerability maps directly to several techniques within the MITRE ATT&CK framework, particularly those related to initial access and privilege escalation. The exploitation method corresponds to T1078, Valid Accounts, although in this specific case, it involves bypassing account requirements entirely through improper validation logic rather than stealing credentials. Furthermore, if the exposed functionality allows for command execution or file manipulation, it may also relate to T1505, Server Software Components, where an attacker leverages a vulnerable component to establish persistence or execute further malicious activities. The lack of proper authorization checks means that standard security controls such as role-based access control are rendered ineffective against automated scanning tools and manual exploitation attempts targeting these specific endpoints.
To mitigate this risk, immediate action is required by system administrators and website owners utilizing the affected versions of the MountDev AI MCP Connector for WordPress. The primary remediation step is to upgrade the plugin to a version released after 1.6.5 where the vendor has presumably implemented proper authorization checks and validated user permissions before processing requests. Until an update is available, it is advisable to disable or uninstall the plugin if its functionality is not strictly necessary for business operations. Additionally, implementing Web Application Firewall rules that restrict access to known vulnerable endpoints can provide a temporary layer of defense by blocking unauthorized HTTP methods or parameters associated with the exploit vector. Regular security audits and penetration testing should be conducted to identify similar authorization flaws in other plugins and custom code within the WordPress environment, ensuring that all administrative interfaces are protected against unauthenticated access attempts.