{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-29T13:22:13.861","vulnerabilities":[{"cve":{"id":"CVE-2021-21317","sourceIdentifier":"security-advisories@github.com","published":"2021-02-16T18:15:12.583","lastModified":"2024-11-21T05:48:00.547","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"uap-core in an open-source npm package which contains the core of BrowserScope's original user agent string parser. In uap-core before version 0.11.0, some regexes are vulnerable to regular expression denial of service (REDoS) due to overlapping capture groups. This allows remote attackers to overload a server by setting the User-Agent header in an HTTP(S) request to maliciously crafted long strings. This is fixed in version 0.11.0. Downstream packages such as uap-python, uap-ruby etc which depend upon uap-core follow different version schemes."},{"lang":"es","value":"uap-core en un paquete npm de código abierto que contiene el core del analizador de cadenas del agente de usuario original de BrowserScope. En uap-core versiones anteriores a 0.11.0, algunas expresiones regulares son vulnerables a una denegación de servicio de expresión regular (REDoS) debido a la superposición de grupos de captura. Esto permite a atacantes remotos sobrecargar un servidor configurando el encabezado User-Agent en una petición HTTP(S) en cadenas largas diseñadas maliciosamente. Esto es corregido en versión 0.11.0. Los paquetes posteriores como uap-python, uap-ruby, etc., que dependen de uap-core, siguen esquemas de versiones diferentes"}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":1.4},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":1.4}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","baseScore":5.0,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":10.0,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-400"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-1333"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:uap-core_project:uap-core:*:*:*:*:*:node.js:*:*","versionEndExcluding":"0.11.0","matchCriteriaId":"77C70DB0-831D-4909-B87A-839C80F96572"}]}]}],"references":[{"url":"https://github.com/ua-parser/uap-core/commit/dc9925d458214cfe87b93e35346980612f6ae96c","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/ua-parser/uap-core/security/advisories/GHSA-p4pj-mg4r-x6v4","source":"security-advisories@github.com","tags":["Third Party Advisory"]},{"url":"https://www.npmjs.com/package/uap-core","source":"security-advisories@github.com","tags":["Product","Third Party Advisory"]},{"url":"https://github.com/ua-parser/uap-core/commit/dc9925d458214cfe87b93e35346980612f6ae96c","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://github.com/ua-parser/uap-core/security/advisories/GHSA-p4pj-mg4r-x6v4","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://www.npmjs.com/package/uap-core","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Product","Third Party Advisory"]}]}}]}