CVE-2025-11286 identifies a server-side request forgery (SSRF) vulnerability in samanhappy MCPHub, a software product used for managing certain network or application services. The vulnerability resides in the MCPRouter Service component, specifically within the source file src/controllers/serverController.ts. The issue arises from improper validation or sanitization of the baseUrl parameter, which an attacker can manipulate to coerce the server into making arbitrary HTTP requests to internal or external systems. This SSRF flaw can be triggered remotely without requiring authentication or user interaction, increasing its risk profile. The vulnerability affects all MCPHub versions from 0.9.0 through 0.9.10. Despite early notification, the vendor has not responded or released patches, leaving systems exposed. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:H but no authentication needed), no user interaction (UI:N), and low impact on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). While no known exploits are currently observed in the wild, the public disclosure increases the likelihood of exploitation attempts. The SSRF can be leveraged to access internal services, bypass firewall restrictions, or perform reconnaissance, potentially leading to further compromise depending on the internal network configuration and the sensitivity of accessible resources.

For European organizations, the SSRF vulnerability in MCPHub poses a significant risk, particularly for those using MCPHub in critical infrastructure, telecommunications, or enterprise network management. Exploitation could allow attackers to pivot from the exposed MCPHub server into internal networks, accessing sensitive data or internal APIs not intended for external exposure. This could lead to data breaches, unauthorized information disclosure, or facilitate lateral movement for more severe attacks. The medium severity rating reflects moderate impact potential; however, the lack of vendor patching increases exposure duration. Organizations with MCPHub deployments in sectors such as finance, healthcare, or government could face regulatory and compliance risks under GDPR if personal or sensitive data is compromised. Additionally, SSRF can be a stepping stone for more complex attacks, including server compromise or denial of service if internal services are disrupted. The risk is amplified in environments where network segmentation is weak or where MCPHub has elevated privileges or access to critical backend systems.

Given the absence of an official patch, European organizations should implement immediate compensating controls. First, restrict outbound HTTP/HTTPS requests from MCPHub servers using network-level controls such as firewall rules or proxy filtering to limit the server's ability to reach unauthorized internal or external endpoints. Second, apply strict input validation and sanitization on the baseUrl parameter at the application or web server level if possible, to block suspicious or unexpected URL patterns. Third, deploy web application firewalls (WAFs) with custom rules to detect and block SSRF attack patterns targeting MCPHub endpoints. Fourth, conduct thorough network segmentation to isolate MCPHub servers from sensitive internal resources, minimizing the impact of potential SSRF exploitation. Fifth, monitor logs and network traffic for unusual outbound requests originating from MCPHub instances. Finally, maintain an active vulnerability management process to promptly apply vendor patches once available and consider alternative software solutions if MCPHub remains unsupported.