S4E

MCP SSE API Detection Scanner

This scanner detects the use of MCP SSE API Detection in digital assets. It helps identify exposed Model Context Protocol servers that could potentially lead to unauthorized access and system compromise.

Short Info


Level

Low

Single Scan

Single Scan

Can be used by

Asset Owner

Estimated Time

10 seconds

Time Interval

10 days 23 hours

Scan only one

URL

Toolbox

The Model Context Protocol (MCP) is often used in AI tools, LLM systems, and other automation infrastructures to manage and monitor tasks. It is utilized by developers, system administrators, and organizations to facilitate data flow and seamless integration within systems. MCP offers efficient handling of context-specific tasks and enables advanced functionalities through its protocol. It's mostly prevalent in scenarios where automation and intelligent systems are integral to operations. As MCP becomes more widespread, understanding its vulnerabilities becomes critical to maintaining system integrity and security.

This scanner detects exposed MCP servers via the SSE API, which can lead to serious security issues if left unaudited. The vulnerability allows unauthorized access to sensitive administrative sections of AI systems and other critical infrastructure utilizing MCP. By identifying such exposures, users can prevent information disclosure and potential system breaches. It emphasizes the necessity of securing API endpoints to safeguard against unwanted intrusions. Addressing this vulnerability involves comprehensive measures to restrict unauthorized data access.

The vulnerability stems from the exposure of the SSE API, often unintentionally left open. It can be accessed through certain endpoints returning specific status codes or content types, such as text/event-stream. The scanner identifies these patterns and detects any exposed message endpoints that could be exploited. The SSE API's communication of event streams needs strict controls to ensure that only authorized entities can make requests. Proper configurations can prevent inadvertent endpoint exposure, protecting against potential exploits.

If this vulnerability is exploited, it can lead to unauthorized access to critical parts of a system or application. A compromised MCP server could result in data leaks, unauthorized administrative access, and potential system commands executed by unauthorized parties. Sensitive information could be disclosed, affecting the overall security posture of the affected infrastructure. Long-term exploitation could even lead to reputational damage and financial loss due to compromised AI systems or operational disruptions.

REFERENCES

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