{"id":"CVE-2018-6342","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-6342","generatedAt":"2026-10-28T19:04:29.084Z","title":"react-dev-utils on Windows allows developers to run a local webserver for accepting various commands, including a command to launch an editor.","description":"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.","published":"2018-12-31T22:29:00.000Z","lastModified":"2026-06-17T02:01:42.000Z","status":"Modified","sourceIdentifier":"cve-assign@fb.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-78"],"affected":["facebook/react-dev-utils"],"epss":{"score":0.02845,"percentile":0.86621,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (2.84%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/facebook/create-react-app/pull/4866","tags":["Third Party Advisory"],"source":"cve-assign@fb.com"},{"url":"https://github.com/facebook/create-react-app/releases/tag/v1.1.5","tags":["Release Notes","Third Party Advisory"],"source":"cve-assign@fb.com"},{"url":"https://github.com/facebook/create-react-app/pull/4866","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/facebook/create-react-app/releases/tag/v1.1.5","tags":["Release Notes","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-6342","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}