{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-20T19:07:08.824","vulnerabilities":[{"cve":{"id":"CVE-2021-23986","sourceIdentifier":"security@mozilla.org","published":"2021-03-31T14:15:19.343","lastModified":"2024-11-21T05:52:09.577","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"A malicious extension with the 'search' permission could have installed a new search engine whose favicon referenced a cross-origin URL. The response to this cross-origin request could have been read by the extension, allowing a same-origin policy bypass by the extension, which should not have cross-origin permissions. This cross-origin request was made without cookies, so the sensitive information disclosed by the violation was limited to local-network resources or resources that perform IP-based authentication. This vulnerability affects Firefox < 87."},{"lang":"es","value":"Una extensión maliciosa con el permiso de \"search\" podría haber instalado un nuevo motor de búsqueda cuyo favicon hiciera referencia a una URL de origen cruzado.&#xa0;La respuesta a esta petición de origen cruzado podría haber sido leída por la extensión, permitiendo a la extensión omitir la política del mismo origen, que no debería tener permisos de origen cruzado.&#xa0;Esta petición de origen cruzado fue hecha sin cookies, por lo que la información confidencial divulgada por la infracción se limitó a los recursos de la red local o los recursos que llevan a cabo la autenticación basada en IP.&#xa0;Esta vulnerabilidad afecta a Firefox versiones anteriores a 87."}],"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:U/C:H/I:N/A:N","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":3.6}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:P/I:N/A:N","baseScore":4.3,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"NONE","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-346"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*","versionEndExcluding":"87.0","matchCriteriaId":"3533FF74-0FD6-447B-9C37-D491D18EA529"}]}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1692623","source":"security@mozilla.org","tags":["Issue Tracking","Permissions Required","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2021-10/","source":"security@mozilla.org","tags":["Vendor Advisory"]},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1692623","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Permissions Required","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2021-10/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]}]}}]}