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CVE-2025-62801

25
FAUCET Score

CVE-2025-62801 is a command-injection vulnerability in jlowin FastMCP versions prior to 2.13.0, allowing an attacker to execute arbitrary OS commands on Windows hosts by manipulating the server_name field. This vulnerability carries a high CVSS score of 7.8, indicating a significant risk with high impact on confidentiality, integrity, and availability, though it requires local access. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.13.0CPE matchmatch criteria
cpe:2.3:a:jlowin:fastmcp:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

5.4MEDIUM

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
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
ACTIVE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.21%
Probability of exploitation in next 30 days
EPSS Percentile
11.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0021 is in the 39th percentile among its peer group of 16,994 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

pippatch availablevia ghsa
Product: fastmcpFixed in: 2.13.0

Vendor Advisories (1)

pipGHSA-rj5c-58rq-j5g5medium

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

Oct 29, 2025

References

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