CVE-2026-15015 json
MountDev AI MCP Connector for WordPress <= 1.6.1 - Unauthenticated Privilege Escalation via OAuth Authorization Endpoint
published 2026-07-23 3 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-47907
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.6%
- EPSS 2.6% chance of exploitation in 30 days, percentile 85%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 3 mo ago
Exploit prediction
2.65% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template MountDev AI MCP Connector <= 1.6.1 - Unauthenticated Admin OAuth Token Exposure nuclei detection template
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- cascadiawebservices MountDev AI MCP Connector for WordPress
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/ce8ec66f-5efc-4354-8871-8e35ab4e51fc?source=cve
- plugins.trac.wordpress.org /browser/mountdev-ai-mcp-connector/tags/1.6.0/includes/class-oauth-controller.php#L571
- plugins.trac.wordpress.org /browser/mountdev-ai-mcp-connector/tags/1.6.0/includes/class-oauth-controller.php#L474
- plugins.trac.wordpress.org /browser/mountdev-ai-mcp-connector/tags/1.6.0/includes/class-oauth-controller.php#L188
- plugins.trac.wordpress.org /browser/mountdev-ai-mcp-connector/tags/1.6.0/includes/class-oauth-controller.php#L370
- plugins.trac.wordpress.org /changeset?reponame=&old=3601448%40mountdev-ai-mcp-connector&new=3601448%40mountdev-ai-mcp-connector
Sources
- CVE List CVE-2026-15015
- NVD CVE-2026-15015
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.