CVE-2026-15015
MountDev AI MCP Connector for WordPress <= 1.6.1 - Unauthenticated Privilege Escalation via OAuth Authorization Endpoint
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.
INFO
Published Date :
July 23, 2026, 10:16 a.m.
Last Modified :
July 23, 2026, 10:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-15015
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update the MountDev AI MCP Connector to version 1.6.2 or later.
- Remove any self-registered OAuth clients.
- Review all registered OAuth clients.
- Disable Dynamic Client Registration if not needed.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-15015.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-15015 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-15015
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-15015 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-15015 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Jul. 23, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'cascadiawebservices', 'product': 'MountDev AI MCP Connector for WordPress', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '1.6.1'}], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-862 Added Reference https://plugins.trac.wordpress.org/browser/mountdev-ai-mcp-connector/tags/1.6.0/includes/class-oauth-controller.php#L188 Added Reference https://plugins.trac.wordpress.org/browser/mountdev-ai-mcp-connector/tags/1.6.0/includes/class-oauth-controller.php#L370 Added Reference https://plugins.trac.wordpress.org/browser/mountdev-ai-mcp-connector/tags/1.6.0/includes/class-oauth-controller.php#L474 Added Reference https://plugins.trac.wordpress.org/browser/mountdev-ai-mcp-connector/tags/1.6.0/includes/class-oauth-controller.php#L571 Added Reference https://plugins.trac.wordpress.org/changeset?reponame=&old=3601448%40mountdev-ai-mcp-connector&new=3601448%40mountdev-ai-mcp-connector Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/ce8ec66f-5efc-4354-8871-8e35ab4e51fc?source=cve