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Vulnerability record · CVE-2014-6393 · published 9 August 2017

CVE-2014-6393: Openjsf express cross-site scripting vulnerability

Openjsf · Express

The Express web framework before 3.11 and 4.x before 4.5 for Node.js does not provide a charset field in HTTP Content-Type headers in 400 level responses, which might allow remote attackers to conduct cross-site scripting (XSS) attacks via characters in a non-standard encoding.

6.1 CVSS 3.0 Medium EPSS 1.1% · top 34.8% CWE-79 · Cross-site scripting
6.1CVSS 3.0 base score, v2 4.3
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

The Express web framework before 3.11 and 4.x before 4.5 for Node.js does not provide a charset field in HTTP Content-Type headers in 400 level responses, which might allow remote attackers to conduct cross-site scripting (XSS) attacks via characters in a non-standard encoding.

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=1203190 Issue TrackingThird Party AdvisoryVDB Entry
https://nodesecurity.io/advisories/express-no-charset-in-content-type-header Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1203190 Issue TrackingThird Party AdvisoryVDB Entry
https://nodesecurity.io/advisories/express-no-charset-in-content-type-header Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2014-6393), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.