CVE-2025-11287 in MCPHub
Summary
by MITRE • 10/05/2025
A vulnerability was identified in samanhappy MCPHub up to 0.9.10. This vulnerability affects the function handleSseConnectionfunction of the file src/services/sseService.ts. Such manipulation leads to improper authentication. The attack may be launched remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 10/05/2025
The vulnerability CVE-2025-11287 represents a critical authentication flaw within the samanhappy MCPHub software version 0.9.10 and earlier. This issue resides in the handleSseConnectionfunction located within the src/services/sseService.ts file, indicating a fundamental weakness in the server-side events handling mechanism that governs real-time communication between client and server components. The flaw allows for improper authentication, meaning that unauthorized parties can potentially bypass legitimate authentication processes and gain access to protected resources or functionality within the system.
The technical nature of this vulnerability stems from inadequate validation and verification mechanisms within the SSE connection handling process. Server-side events typically facilitate real-time updates from server to client, but when the authentication checks are improperly implemented or bypassed, attackers can establish connections without proper credentials. This weakness directly maps to CWE-287 which addresses improper authentication issues, and aligns with ATT&CK technique T1078 for valid accounts and T1566 for social engineering through malicious web content. The vulnerability's remote exploitability means that attackers do not require physical access or local network presence to target the system, significantly expanding the attack surface.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it can potentially enable attackers to manipulate real-time data streams, monitor sensitive communications, or even execute further attacks through the compromised connection channels. Given that the exploit is publicly available and actively being used, the risk assessment increases substantially, as organizations cannot rely on the assumption that this vulnerability remains unknown to threat actors. The lack of vendor response to early disclosure attempts compounds the severity, leaving affected systems without official patches or mitigation guidance, forcing organizations to implement emergency measures or seek alternative solutions.
Mitigation strategies for this vulnerability should prioritize immediate implementation of additional authentication layers, network segmentation to restrict access to the affected service, and monitoring for unauthorized connection attempts. Organizations should consider implementing rate limiting and connection validation checks to prevent exploitation attempts. The absence of vendor response necessitates proactive security measures including potential code modifications to strengthen authentication within the SSE handling functions, deployment of intrusion detection systems to monitor for suspicious connection patterns, and regular security assessments to identify similar vulnerabilities in other components. Additionally, organizations should consider implementing zero trust principles for any services utilizing server-side events to ensure that every connection attempt undergoes strict verification regardless of perceived trust levels.