{"id":"CVE-2014-6393","aliases":["GHSA-gpvr-g6gh-9mc2"],"url":"https://o3.security/vulnerability/CVE-2014-6393","summary":"No Charset in Content-Type Header in express","details":"Vulnerable versions of express do not specify a charset field in the content-type header while displaying 400 level response messages. The lack of enforcing user's browser to set correct charset, could be leveraged by an attacker to perform a cross-site scripting attack, using non-standard encodings, like UTF-7.\n\n\n## Recommendation\n\nFor express 3.x, update express to version 3.11 or later.\nFor express 4.x, update express to version 4.5 or later. ","published":"2017-08-09T18:29:00Z","modified":"2026-04-10T03:43:59.990634Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"express","fixedVersion":"3.11.0"},{"ecosystem":"npm","name":"express","fixedVersion":"4.5.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1203190"},{"type":"ADVISORY","url":"https://nodesecurity.io/advisories/express-no-charset-in-content-type-header"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2014-6393"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-gpvr-g6gh-9mc2"},{"type":"WEB","url":"https://www.npmjs.com/advisories/8"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-04-10T03:43:59.990634Z"}}