What’s Vulnerable › Vulnerabilities

CVE-2014-6393

• Severity: medium (CVSS 6.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-08-09 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• expressjs express: through 3.10.5; 4.0.0, 4.1.0, 4.1.1, 4.1.2, 4.2.0, 4.3.0 (+8)

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1203190
• https://nodesecurity.io/advisories/express-no-charset-in-content-type-header
• https://bugzilla.redhat.com/show_bug.cgi?id=1203190
• https://nodesecurity.io/advisories/express-no-charset-in-content-type-header

Get alerted when CVE-2014-6393 or the next vulnerability affects your stack