{"affected":[{"affectedData":[{"product":"Firefox","vendor":"Mozilla","versions":[{"lessThan":"59","status":"affected","version":"unspecified","versionType":"custom"}]}],"source":"security@mozilla.org"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*","matchCriteriaId":"5DF580C0-6851-4C48-AA04-CD1B92A1FEB6","versionEndExcluding":"59.0","vulnerable":true}],"negate":false,"operator":"OR"}]},{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*","matchCriteriaId":"B5A6F2F3-4894-4392-8296-3B8DD2679084","vulnerable":true},{"criteria":"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*","matchCriteriaId":"F7016A2A-8365-4F1A-89A2-7A19F2BCAE5B","vulnerable":true},{"criteria":"cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*","matchCriteriaId":"9070C9D8-A14A-467F-8253-33B966C16886","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"URLs using \"javascript:\" have the protocol removed when pasted into the addressbar to protect users from cross-site scripting (XSS) attacks, but if a tab character is embedded in the \"javascript:\" URL the protocol is not removed and the script will execute. This could allow users to be socially engineered to run an XSS attack against themselves. This vulnerability affects Firefox < 59."},{"lang":"es","value":"Las URL que utilizan \"javascript:\" eliminan el protocolo cuando se pega en la barra de direcciones para proteger a los usuarios de ataques Cross-Site Scripting (XSS), pero si hay un carácter de tabulación incrustado en la URL \"javascript:\", el protocolo no se elimina y el script se ejecutará. Esto podría permitir que se realice ingeniería social sobre los usuarios para ejecutar un ataque Cross-Site Scripting (XSS) contra ellos mismos. Esta vulnerabilidad afecta a las versiones anteriores a la 59 de Firefox."}],"id":"CVE-2018-5143","lastModified":"2026-06-17T01:59:42.103","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"MEDIUM","cvssData":{"accessComplexity":"MEDIUM","accessVector":"NETWORK","authentication":"NONE","availabilityImpact":"NONE","baseScore":4.3,"confidentialityImpact":"NONE","integrityImpact":"PARTIAL","vectorString":"AV:N/AC:M/Au:N/C:N/I:P/A:N","version":"2.0"},"exploitabilityScore":8.6,"impactScore":2.9,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":true}],"cvssMetricV30":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.0"},"exploitabilityScore":2.8,"impactScore":2.7,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2018-06-11T21:29:14.657","references":[{"source":"security@mozilla.org","tags":["Third Party Advisory","VDB Entry"],"url":"http://www.securityfocus.com/bid/103386"},{"source":"security@mozilla.org","tags":["Third Party Advisory","VDB Entry"],"url":"http://www.securitytracker.com/id/1040514"},{"source":"security@mozilla.org","tags":["Issue Tracking","Vendor Advisory"],"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1422643"},{"source":"security@mozilla.org","tags":["Third Party Advisory"],"url":"https://usn.ubuntu.com/3596-1/"},{"source":"security@mozilla.org","tags":["Vendor Advisory"],"url":"https://www.mozilla.org/security/advisories/mfsa2018-06/"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory","VDB Entry"],"url":"http://www.securityfocus.com/bid/103386"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory","VDB Entry"],"url":"http://www.securitytracker.com/id/1040514"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Vendor Advisory"],"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1422643"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"],"url":"https://usn.ubuntu.com/3596-1/"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"],"url":"https://www.mozilla.org/security/advisories/mfsa2018-06/"}],"sourceIdentifier":"security@mozilla.org","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-79"}],"source":"nvd@nist.gov","type":"Primary"}]}