Vulnerability · Published Jul 23, 2026 · Assigned by Wordfence

CVE-2026-15015MountDev AI MCP Connector for WordPress <= 1.6.1 - Unauthenticated Privilege Escalation via OAuth Authorization Endpoint

Critical 9.8

In plain English

A critical-severity missing authorization in MountDev AI MCP Connector for WordPress from cascadiawebservices. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.6% (higher than 86% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei, public proof-of-concept code.

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)2.6%top 14.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack tooling2Nuclei, Public PoC

Official 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 (as reported)

Vendor	Product	Versions
cascadiawebservices	MountDev AI MCP Connector for WordPress	0 – through 1.6.1

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

In plain English

Official description

Affected products (as reported)

References