{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-19T06:05:41.718","vulnerabilities":[{"cve":{"id":"CVE-2019-11763","sourceIdentifier":"security@mozilla.org","published":"2020-01-08T20:15:12.953","lastModified":"2024-11-21T04:21:44.670","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Failure to correctly handle null bytes when processing HTML entities resulted in Firefox incorrectly parsing these entities. This could have led to HTML comment text being treated as HTML which could have led to XSS in a web application under certain conditions. It could have also led to HTML entities being masked from filters - enabling the use of entities to mask the actual characters of interest from filters. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2."},{"lang":"es","value":"Si no se manejan correctamente los bytes nulos cuando se procesan entidades HTML, Firefox analiza de manera incorrecta estas entidades. Esto podría haber conllevado a que el texto de comentario HTML fuese tratado como un HTML, lo que podría haber provocado una vulnerabilidad de tipo XSS en una aplicación web bajo determinadas condiciones. También podría haber conllevado a que las entidades HTML sean enmascaradas desde los filtros, permitiendo el uso de entidades para enmascarar los caracteres actuales de interés de los filtros. Esta vulnerabilidad afecta a Firefox versiones anteriores a  la versión 70, Thunderbird versiones anteriores 68.2 y Firefox ESR versiones anteriores a la versión  68.2."}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","baseScore":6.1,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":2.7}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:N/I:P/A:N","baseScore":4.3,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"NONE"},"baseSeverity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-79"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*","versionEndExcluding":"70.0","matchCriteriaId":"F4EA7BDA-DA95-46FB-8568-E857D3479994"},{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*","versionEndExcluding":"68.2","matchCriteriaId":"19FED95C-5BAF-4E31-8F60-E51609BA3BDB"},{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*","versionEndExcluding":"68.2","matchCriteriaId":"2CE97332-80EC-4CDF-A18C-37CD645A8A12"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*","matchCriteriaId":"7A5301BF-1402-4BE0-A0F8-69FBE79BC6D6"}]}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1584216","source":"security@mozilla.org","tags":["Issue Tracking","Permissions Required"]},{"url":"https://security.gentoo.org/glsa/202003-10","source":"security@mozilla.org","tags":["Third Party Advisory"]},{"url":"https://usn.ubuntu.com/4335-1/","source":"security@mozilla.org","tags":["Third Party Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2019-33/","source":"security@mozilla.org","tags":["Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2019-34/","source":"security@mozilla.org","tags":["Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2019-35/","source":"security@mozilla.org","tags":["Vendor Advisory"]},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1584216","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Permissions Required"]},{"url":"https://security.gentoo.org/glsa/202003-10","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://usn.ubuntu.com/4335-1/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2019-33/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2019-34/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2019-35/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]}]}}]}