Authentication Bypass in MCPHub < 0.11.0 Allows Privilege Abuse

Executive Summary

CVE-2025-13822 is an authentication bypass vulnerability in MCPHub versions below 0.11.0.

The vulnerability exists because some endpoints in MCPHub are not protected by authentication middleware.

This allows an unauthenticated attacker to perform actions on behalf of other users and use their privileges.

It is classified under CWE-639: Authorization Bypass Through User-Controlled Key.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can allow an attacker who is not authenticated to perform actions as if they were other users.

Such unauthorized actions could lead to misuse of privileges, potentially compromising the integrity and security of the system.

Useful 0 Not Useful 0

Mitigation Strategies

To mitigate the authentication bypass vulnerability in MCPHub versions below 0.11.0, you should upgrade MCPHub to version 0.11.0 or later where the issue is fixed.

Additionally, ensure that all endpoints are properly protected by authentication middleware to prevent unauthenticated access.

Useful 0 Not Useful 0

Detection Guidance

This vulnerability can be detected by testing whether certain MCPHub endpoints allow unauthenticated access and actions. Since the issue is an authentication bypass on some endpoints, you can attempt to access these endpoints without credentials and observe if actions can be performed.

A practical approach is to identify the endpoints exposed by MCPHub and try sending HTTP requests without authentication headers to see if you receive successful responses or can perform privileged actions.

Example commands using curl to test unauthenticated access might include:

• curl -i http://<mcphub-server>/api/endpoint -X GET
• curl -i http://<mcphub-server>/api/endpoint -X POST -d '{"action":"test"}' -H 'Content-Type: application/json'

Replace <mcphub-server> and /api/endpoint with actual server address and endpoint paths. If these requests succeed without authentication, it indicates the presence of the vulnerability.

Useful 0 Not Useful 0