CVE-2025-11953Known exploitationPublic exploitNetwork attack vector

Unauthenticated code execution via unvalidated URL scheme

Published Nov 3, 2025 · Updated Nov 3, 2025

OS command injection in @react-native-community/cli-server-api before 20.0.0 allows remote attackers to execute programs via POST requests. The /open-url route's openURLMiddleware passes the request body's URL directly to open() without parsing it or restricting the scheme to HTTP or HTTPS. Exposure requires a running Metro development server reachable over the network; no authentication is required, and Windows permits fully controlled shell arguments.

CVSS severity9.8
Critical
EPSS probability93.98%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in @react-native-community/cli-server-api before 20.0.0 allows remote attackers to execute programs via POST requests. The /open-url route's openURLMiddleware passes the request body's URL directly to open() without parsing it or restricting the scheme to HTTP or HTTPS. Exposure requires a running Metro development server reachable over the network; no authentication is required, and Windows permits fully controlled shell arguments.

The record

CVE
CVE-2025-11953
Published
Nov 3, 2025
Updated
Nov 3, 2025
Vendor
React Native Community
Product
@react-native-community/cli-server-api
Classifications
CWE-78, T1190, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.
  3. Dec 21, 2025Exploitation reportedVulnCheck Canary Metro4Shell exploitation detections

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=4.8.0 <20.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

React Native Community · @react-native-community/cli-server-apiversion=4.8.0 <20.0.0

Published CVSS scores

9.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1190Exploit Public-Facing Application
T1059Command and Scripting Interpreter

Public exploit references

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

Reported exploitation

Technologies

Your stack

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Your stack

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