CVE-2025-54994Public exploitNetwork attack vector

Remote command execution via interpolated port argument

Published Sep 8, 2025 · Updated Sep 8, 2025

Command injection in create-mcp-server-stdio before 0.0.13 allows remote attackers to execute commands through which-app-on-port. The tool interpolates its port argument into an lsof shell command passed to Node.js exec, so shell metacharacters start additional commands. Exploitation requires a running generated MCP server and a crafted tool call, including through prompt injection; commands run with the server process's privileges.

CVSS severity9.3
Critical
EPSS probability1.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in create-mcp-server-stdio before 0.0.13 allows remote attackers to execute commands through which-app-on-port. The tool interpolates its port argument into an lsof shell command passed to Node.js exec, so shell metacharacters start additional commands. Exploitation requires a running generated MCP server and a crafted tool call, including through prompt injection; commands run with the server process's privileges.

The record

CVE
CVE-2025-54994
Published
Sep 8, 2025
Updated
Sep 8, 2025
Vendor
Akos Komuves
Product
create-mcp-server-stdio
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.0.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Akos Komuves · create-mcp-server-stdioversion=< 0.0.13

Published CVSS scores

9.3GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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