CVE-2025-11287
📋 TL;DR
CVE-2025-11287 is an authentication bypass vulnerability in samanhappy MCPHub's SSE service that allows remote attackers to access protected functionality without proper credentials. This affects all users running MCPHub versions up to 0.9.10. Attackers can exploit this to perform unauthorized actions on vulnerable systems.
💻 Affected Systems
- samanhappy MCPHub
📦 What is this software?
Mcphub by Mcphubx
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary code, access sensitive data, or take full control of the MCPHub instance and potentially underlying systems.
Likely Case
Unauthorized access to MCPHub functionality, data exfiltration, privilege escalation, and potential lateral movement within the network.
If Mitigated
Limited impact with proper network segmentation, strong authentication controls, and monitoring in place to detect unauthorized access attempts.
🎯 Exploit Status
Exploit details are publicly available in GitHub issues. The vulnerability requires no authentication and has simple exploitation steps.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: Yes
Instructions:
1. Monitor official MCPHub repositories for security updates. 2. Upgrade to a patched version when available. 3. Restart the MCPHub service after applying any patches.
🔧 Temporary Workarounds
Disable SSE Service
allDisable the vulnerable Server-Sent Events service if not required for functionality
Modify MCPHub configuration to disable SSE service
Set SSE_ENABLED=false in configuration
Network Access Control
linuxRestrict network access to MCPHub to trusted IP addresses only
iptables -A INPUT -p tcp --dport [MCPHub_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [MCPHub_PORT] -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate MCPHub from critical systems
- Deploy a Web Application Firewall (WAF) with rules to detect and block authentication bypass attempts
🔍 How to Verify
Check if Vulnerable:
Check MCPHub version. If version is 0.9.10 or earlier, the system is vulnerable. Test authentication bypass by attempting to access SSE endpoints without proper credentials.Check Version:
Check MCPHub configuration files or package manager for version informationVerify Fix Applied:
Verify MCPHub version is above 0.9.10. Test that authentication is properly enforced on SSE endpoints.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to SSE endpoints
- Failed authentication events followed by successful SSE connections
- Unusual patterns in SSE connection logs
Network Indicators:
- Unusual traffic to /sse or similar SSE endpoints
- SSE connections from unexpected IP addresses
- High volume of SSE requests without proper authentication headers
SIEM Query:
source="MCPHub" AND (event="authentication_failure" OR endpoint="/sse") | stats count by src_ip