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Vulnerability details: VCID-dqc7-k8r4-pyej
Vulnerability ID VCID-dqc7-k8r4-pyej
Aliases CVE-2018-6342
GHSA-29gp-92wp-94q8
Summary react-dev-utils on Windows allows developers to run a local webserver for accepting various commands, including a command to launch an editor. The input to that command was not properly sanitized, allowing an attacker who can make a network request to the server (either via CSRF or by direct request) to execute arbitrary commands on the targeted system. This issue affects multiple branches: 1.x.x prior to 1.0.4, 2.x.x prior to 2.0.2, 3.x.x prior to 3.1.2, 4.x.x prior to 4.2.2, and 5.x.x prior to 5.0.2.
Status Published
Exploitability 0.5
Weighted Severity 8.8
Risk 4.4
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2018-6342
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2018-6342
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2018-6342
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2018-6342
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-29gp-92wp-94q8
generic_textual HIGH https://github.com/advisories/GHSA-29gp-92wp-94q8
generic_textual HIGH https://github.com/facebook/create-react-app
cvssv3.1 9.8 https://github.com/facebook/create-react-app/pull/4866
generic_textual HIGH https://github.com/facebook/create-react-app/pull/4866
ssvc Track https://github.com/facebook/create-react-app/pull/4866
cvssv3.1 9.8 https://github.com/facebook/create-react-app/releases/tag/v1.1.5
generic_textual HIGH https://github.com/facebook/create-react-app/releases/tag/v1.1.5
ssvc Track https://github.com/facebook/create-react-app/releases/tag/v1.1.5
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2018-6342
generic_textual HIGH https://www.npmjs.com/advisories/695
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2018-6342
https://github.com/facebook/create-react-app
https://www.npmjs.com/advisories/695
4866 https://github.com/facebook/create-react-app/pull/4866
CVE-2018-6342 https://nvd.nist.gov/vuln/detail/CVE-2018-6342
GHSA-29gp-92wp-94q8 https://github.com/advisories/GHSA-29gp-92wp-94q8
v1.1.5 https://github.com/facebook/create-react-app/releases/tag/v1.1.5
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/facebook/create-react-app/pull/4866
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2025-05-06T16:07:33Z/ Found at https://github.com/facebook/create-react-app/pull/4866
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/facebook/create-react-app/releases/tag/v1.1.5
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2025-05-06T16:07:33Z/ Found at https://github.com/facebook/create-react-app/releases/tag/v1.1.5
Exploit Prediction Scoring System (EPSS)
Percentile 0.74397
EPSS Score 0.00794
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T17:33:59.486481+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2018/6xxx/CVE-2018-6342.json 38.6.0