CVE-2025-62801

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/jlowin/fastmcp/security/advisories/GHSA-rj5c-58rq-j5g5	Exploit Third Party Advisory
https://github.com/jlowin/fastmcp/security/advisories/GHSA-rj5c-58rq-j5g5	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:jlowin:fastmcp:*:*:*:*:*:*:*:*

History

04 Nov 2025, 13:24

Type	Values Removed	Values Added
References	~~() https://github.com/jlowin/fastmcp/security/advisories/GHSA-rj5c-58rq-j5g5 -~~	() https://github.com/jlowin/fastmcp/security/advisories/GHSA-rj5c-58rq-j5g5 - Exploit, Third Party Advisory
First Time		Jlowin Jlowin fastmcp
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.8
CPE		cpe:2.3:a:jlowin:fastmcp::::::::

29 Oct 2025, 15:15

Type	Values Removed	Values Added
References	~~() https://github.com/jlowin/fastmcp/security/advisories/GHSA-rj5c-58rq-j5g5 -~~	() https://github.com/jlowin/fastmcp/security/advisories/GHSA-rj5c-58rq-j5g5 -

28 Oct 2025, 22:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-10-28 22:15

Updated : 2025-11-04 13:24

NVD link : CVE-2025-62801

Mitre link : CVE-2025-62801

CVE.ORG link : CVE-2025-62801

JSON object : View

Products Affected

jlowin

fastmcp

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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