CVE-2025-62801

FastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_name

Published Oct 28, 2025 CVSS 4.0 · 5.4 Medium EPSS < 1% KEV · Not listed
Description
FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0, a command-injection vulnerability lets any attacker who can influence the server_name field of an MCP execute arbitrary OS commands on Windows hosts that run fastmcp install cursor. This vulnerability is fixed in 2.13.0.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-rj5c-58rq-j5g5 FastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_name
History
Type Values Removed Values Added
First Time appeared Jlowin
Jlowin fastmcp
CPEs cpe:2.3:a:jlowin:fastmcp:*:*:*:*:*:*:*:*
Vendors & Products Jlowin
Jlowin fastmcp
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Fastmcp
Fastmcp fastmcp
Vendors & Products Fastmcp
Fastmcp fastmcp
Type Values Removed Values Added
Description FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0, a command-injection vulnerability lets any attacker who can influence the server_name field of an MCP execute arbitrary OS commands on Windows hosts that run fastmcp install cursor. This vulnerability is fixed in 2.13.0.
Title FastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_name
Weaknesses CWE-78
References
Metrics cvssV4_0

{'score': 5.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 29, 2025, 2:54 PM
Reserved
Oct 22, 2025, 6:55 PM
Status
Analyzed
Published
Oct 28, 2025, 10:15 PM
Modified
Oct 8, 2026, 11:10 AM