{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-18T22:50:25.592","vulnerabilities":[{"cve":{"id":"CVE-2021-4221","sourceIdentifier":"security@mozilla.org","published":"2022-12-22T20:15:12.337","lastModified":"2025-04-16T16:15:19.290","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"If a domain name contained a RTL character, it would cause the domain to be rendered to the right of the path. This could lead to user confusion and spoofing attacks. <br>*This bug only affects Firefox for Android. Other operating systems are unaffected.*<br>*Note*: Due to a clerical error this advisory was not included in the original announcement, and was added in Feburary 2022. This vulnerability affects Firefox < 92."},{"lang":"es","value":"Si un nombre de dominio contuviera un carácter RTL, el dominio se representaría a la derecha de la ruta. Esto podría generar confusión en el usuario y ataques de suplantación de identidad. <br>*Este error sólo afecta a Firefox para Android. Otros sistemas operativos no se ven afectados.*<br>*Nota*: Debido a un error administrativo, este aviso no se incluyó en el anuncio original y se agregó en febrero de 2022. Esta vulnerabilidad afecta a Firefox &lt; 92."}],"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:N/I:L/A:N","baseScore":4.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":1.4},{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","baseScore":4.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":1.4}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"NVD-CWE-Other"}]},{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","description":[{"lang":"en","value":"CWE-1007"}]}],"configurations":[{"operator":"AND","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*","versionEndExcluding":"92.0","matchCriteriaId":"117CF1EF-253C-4D02-96C4-EA184FC46C3A"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"criteria":"cpe:2.3:o:google:android:-:*:*:*:*:*:*:*","matchCriteriaId":"F8B9FEC8-73B6-43B8-B24E-1F7C20D91D26"}]}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1704422","source":"security@mozilla.org","tags":["Exploit","Issue Tracking","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2021-38/","source":"security@mozilla.org","tags":["Vendor Advisory"]},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1704422","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Issue Tracking","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2021-38/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]}]}}]}