CVE-2025-62801 — HIGH (7.8)

Q: How severe is CVE-2025-62801?

CVE-2025-62801 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2025-62801?

Check the references section above for vendor advisories and patch information. Affected products include: Jlowin Fastmcp.

Vulnerability 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 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Jlowin	Fastmcp	< 2.13.0

Related Weaknesses (CWE)

CWE-78

References

https://github.com/jlowin/fastmcp/security/advisories/GHSA-rj5c-58rq-j5g5ExploitThird Party Advisory
https://github.com/jlowin/fastmcp/security/advisories/GHSA-rj5c-58rq-j5g5ExploitThird Party Advisory

FAQ

What is CVE-2025-62801?

CVE-2025-62801 is a vulnerability with a CVSS score of 7.8 (HIGH). 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...

How severe is CVE-2025-62801?

CVE-2025-62801 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-62801?

Check the references section above for vendor advisories and patch information. Affected products include: Jlowin Fastmcp.