CVE-2025-62801
BaseFortify
Publication date: 2025-10-28
Last updated on: 2025-11-04
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| jlowin | fastmcp | to 2.13.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-78 | The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a command-injection flaw in FastMCP versions prior to 2.13.0. It allows an attacker who can influence the server_name field of an MCP to execute arbitrary operating system commands on Windows hosts running FastMCP with the install cursor. This means the attacker can run any command on the affected system, potentially taking control or causing damage. The issue is fixed in version 2.13.0.
How can this vulnerability impact me? :
If exploited, this vulnerability can allow an attacker to execute arbitrary OS commands on your Windows system running FastMCP, potentially leading to unauthorized access, data compromise, system manipulation, or disruption of services. This can result in loss of data integrity, confidentiality, and availability.
What immediate steps should I take to mitigate this vulnerability?
Upgrade FastMCP to version 2.13.0 or later, as this version fixes the command-injection vulnerability related to the server_name field. Additionally, restrict or validate any input that can influence the server_name field to prevent exploitation.