CVE-2025-65513 identifies a Server-Side Request Forgery (SSRF) vulnerability in fetch-mcp version 1.0.2 and earlier. SSRF vulnerabilities occur when an attacker can manipulate a server to make HTTP requests to arbitrary domains, including internal or private IP addresses that are normally inaccessible externally. In this case, fetch-mcp's private IP validation is flawed, allowing attackers to bypass these checks and access internal network resources. This can lead to unauthorized access to sensitive internal services, potentially exposing confidential data or enabling further attacks such as lateral movement or privilege escalation. The vulnerability does not require authentication or user interaction, making it easier to exploit remotely. Although no public exploits have been reported yet, the nature of SSRF vulnerabilities means that attackers could leverage this flaw to perform reconnaissance on internal networks, access metadata services, or exploit other internal vulnerabilities. The lack of a CVSS score indicates that the vulnerability is newly published, but its characteristics suggest a significant risk. The absence of patch links implies that fixes may not yet be available, underscoring the need for immediate mitigation measures. Organizations using fetch-mcp should prioritize monitoring and network controls to limit exposure until patches are released.

For European organizations, the SSRF vulnerability in fetch-mcp could lead to unauthorized internal network access, compromising confidentiality and potentially availability of critical systems. Attackers could exploit this flaw to access sensitive internal services, steal data, or pivot to other systems within the network. This is particularly concerning for sectors with sensitive data such as finance, healthcare, and government. The ability to bypass private IP validation means that perimeter defenses can be circumvented, increasing the risk of internal breaches. Additionally, the vulnerability could be leveraged to access cloud metadata services or internal APIs, leading to further compromise. The impact extends to operational disruption if critical internal services are accessed or manipulated. Given the lack of authentication requirements, the attack surface is broad, potentially affecting any exposed fetch-mcp deployments. European organizations with complex internal networks and those relying on fetch-mcp for critical operations face elevated risks.

1. Monitor network traffic for unusual outbound requests originating from fetch-mcp instances, especially those targeting internal IP ranges. 2. Implement strict network segmentation and firewall rules to restrict fetch-mcp's ability to initiate requests to sensitive internal resources. 3. Apply input validation and sanitization to any user-controllable parameters that influence fetch-mcp's request destinations. 4. Deploy web application firewalls (WAFs) with rules designed to detect and block SSRF attack patterns. 5. Maintain an inventory of all fetch-mcp deployments and prioritize patching as soon as updates addressing this vulnerability are released. 6. Use network-level egress filtering to prevent unauthorized internal IP address access from application servers. 7. Conduct internal penetration testing focusing on SSRF vectors to identify and remediate similar weaknesses. 8. Educate development and operations teams about SSRF risks and secure coding practices to prevent future vulnerabilities.