CVE-2021-42740

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:shell-quote_project:shell-quote:*:*:*:*:*:node.js:*:*", "matchCriteriaId": "15FCC4D6-BC95-4B63-BDDF-DB28E3E94A38", "versionEndExcluding": "1.7.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The shell-quote package before 1.7.3 for Node.js allows command injection. An attacker can inject unescaped shell metacharacters through a regex designed to support Windows drive letters. If the output of this package is passed to a real shell as a quoted argument to a command with exec(), an attacker can inject arbitrary commands. This is because the Windows drive letter regex character class is {A-z] instead of the correct {A-Za-z]. Several shell metacharacters exist in the space between capital letter Z and lower case letter a, such as the backtick character."}, {"lang": "es", "value": "El paquete shell-quote versiones anteriores a 1.7.3 para Node.js permite una inyecci\u00f3n de comandos. Un atacante puede inyectar metacaracteres de shell sin esconder mediante una regex dise\u00f1ada para soportar letras de unidad de Windows. Si la salida de este paquete se pasa a un shell real como un argumento citado a un comando con exec(), un atacante puede inyectar comandos arbitrarios. Esto es debido a que la clase de caracteres regex de la letra de unidad de Windows es {A-z] en lugar de la correcta {A-Za-z]. Se presentan varios metacaracteres del shell en el espacio entre la letra Z may\u00fascula y la letra a min\u00fascula, como el car\u00e1cter backtick"}], "id": "CVE-2021-42740", "lastModified": "2026-06-17T04:10:03.200", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-10-21T15:15:07.633", "references": [{"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://github.com/substack/node-shell-quote/blob/master/CHANGELOG.md#173"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/substack/node-shell-quote/commit/5799416ed454aa4ec9afafc895b4e31760ea1abe"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://www.npmjs.com/package/shell-quote"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/substack/node-shell-quote/blob/master/CHANGELOG.md#173"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/substack/node-shell-quote/commit/5799416ed454aa4ec9afafc895b4e31760ea1abe"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.npmjs.com/package/shell-quote"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-77"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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