# CVE-2026-15015: MountDev AI MCP Connector for WordPress - Authorization Bypass

> Live exploitation tracking for CVE-2026-15015 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2026-15015

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 9.8
- **Public exploit available:** Yes
- **Affected products:** Cascadiawebservices MountDev AI MCP Connector for WordPress
- **Weaknesses:** CWE-862 (Missing Authorization)
- **Tags:** wordpress, ai_mcp, 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.

## CrowdSec analysis

[CVE-2026-15015](https://euvd.enisa.europa.eu/vulnerability/CVE-2026-15015) is a critical authorization bypass in the MountDev AI MCP Connector for WordPress, affecting versions up to and including 1.6.1. Unauthenticated attackers can exploit the plugin’s OAuth endpoints to obtain an administrator-bound bearer token, potentially gaining administrator-equivalent access to exposed WordPress content, users, options, and MCP tools.

CrowdSec has been tracking this vulnerability and its exploits since 21st of October 2026.

CrowdSec has not observed any significant exploitation activity targeting CVE-2026-15015 across its network. As a result, no community-driven trend analysis is available for this vulnerability at this time.

Attackers target `/mcp-register` to register an OAuth client, then use `/wp-json/mountdev-ai-mcp-connector/v1/oauth/authorize` and `/mcp-token` to obtain an administrator-bound Bearer token without authentication.

## Timeline

- 2026-07-23: CVE Published. CVE-2026-15015 is published to NVD.
- 2026-10-21: Rule Released. CrowdSec releases a rule to detect CVE-2026-15015 exploitation attempts against the CrowdSec Network.

## References

- https://github.com/advisories/GHSA-8g44-6rrm-mf2w
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-15015.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2026-15015) follows observed exploitation activity for CVE-2026-15015. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.