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Critical · 9.8 Scanner template Public exploit CVE-2026-15015 EUVD-2026-47907GHSA-8g44-6rrm-mf2w

MountDev AI MCP Connector for WordPress <= 1.6.1 - Unauthenticated Privilege Escalation via OAuth Authorization Endpoint

Published Jul 23, 2026 · Updated Jul 23, 2026 · Assigned by Wordfence

Vendor: Cascadia Web Services Product: MountDev AI MCP Connector for WordPress Category: Web / CMS

Description

The MountDev AI MCP Connector for WordPress plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.6.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to obtain an administrator-bound OAuth Bearer token via a self-registered client, granting full administrator-equivalent access to the plugin's MCP tool surface and all exposed WordPress content, users, and options. This is exploitable by combining the publicly accessible Dynamic Client Registration endpoint, which allows unauthenticated callers to register arbitrary OAuth clients with an attacker-controlled redirect_uri, with the unprotected authorization endpoint to complete the full OAuth flow without any administrator interaction.

Affected products

VendorProductAffectedFixed
cascadiawebservices MountDev AI MCP Connector for WordPress ≤ 1.6.1 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

  • les-k/wp-secure-mcp ★ 0 · Sep 24, 2026

    A WordPress plugin exposing an MCP server over the REST API, with the security model as the point -- closes the CVE-2026-15015 OAuth-bypass shape by never having that surface at all.

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

References