CVE-2025-11286 is a Server-Side Request Forgery (SSRF) vulnerability identified in samanhappy MCPHub versions up to 0.9.10. The vulnerability exists in the MCPRouter Service component, specifically within the src/controllers/serverController.ts file. The root cause is the improper handling and validation of the baseUrl argument, which attackers can manipulate to cause the server to make unauthorized requests to internal or external resources. SSRF vulnerabilities allow attackers to abuse the server as a proxy to access or interact with internal systems that are otherwise inaccessible from the outside, potentially leading to information disclosure, internal network scanning, or further exploitation. This vulnerability can be triggered remotely without user interaction and does not require authentication, increasing its risk profile. The CVSS 4.0 score is 5.1 (medium severity), reflecting the moderate impact on confidentiality, integrity, and availability, with low complexity and no privileges required. The vendor was notified but has not responded or issued a patch, and no known exploits are currently observed in the wild. However, the public disclosure of the vulnerability increases the risk of exploitation attempts. MCPHub is a software product used for managing or routing services, and the presence of SSRF could allow attackers to pivot within the network or access sensitive internal endpoints, depending on deployment context.

For European organizations using samanhappy MCPHub, this SSRF vulnerability poses a moderate risk. Exploitation could allow attackers to bypass perimeter defenses and access internal services, potentially leading to data leakage, unauthorized access to internal APIs, or reconnaissance of internal network infrastructure. This is particularly concerning for organizations with sensitive internal systems or regulatory requirements around data protection (e.g., GDPR). The lack of vendor response and patch availability increases exposure time. While the vulnerability does not directly allow remote code execution or privilege escalation, the ability to make arbitrary server-side requests can be leveraged as a stepping stone for more sophisticated attacks. Organizations in sectors such as finance, healthcare, and critical infrastructure in Europe, which often deploy complex internal networks and rely on secure service routing, may face increased risk. The medium severity rating suggests that while the threat is not critical, it should be addressed promptly to prevent potential lateral movement or data exposure.

Given the absence of an official patch, European organizations should implement immediate compensating controls. First, restrict outbound HTTP/HTTPS traffic from the MCPHub server to only trusted destinations using network-level controls such as firewall rules or proxy whitelisting to limit SSRF impact. Second, implement strict input validation and sanitization on the baseUrl parameter at the application or reverse proxy level to block suspicious or internal IP addresses and hostnames. Third, monitor logs for unusual outbound requests originating from MCPHub to detect potential exploitation attempts. Fourth, consider deploying web application firewalls (WAFs) with custom rules to detect and block SSRF patterns targeting the baseUrl parameter. Finally, organizations should isolate MCPHub instances in segmented network zones with minimal access to sensitive internal resources to reduce attack surface. Once the vendor releases a patch, prioritize immediate application of the update. Additionally, conduct security assessments to identify any signs of compromise related to this vulnerability.