CVE-2025-62801

MEDIUM EPSS 10.7%
Published Oct 28, 20258mo ago · Modified Jun 17, 20261w ago
5.4 CVSS 4.0
Medium
Find Similar
Published Oct 28, 2025 8mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
5.4
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction A
Scope X

Threat Intelligence

EPSS Exploit Probability
10.7% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-78 OS Command Injection Injection

Affected Products 1

VendorProductVersionRange
jlowinfastmcp* <2.13.0

References 1

  • github.com https://github.com/jlowin/fastmcp/security/advisories/GHSA-rj5c-58rq-j5g5
    ExploitThird Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.