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6.1

Old versions of Express.js may allow hackers to inject malicious code

CVE-2014-6393 · published 9 years ago
Summary

Old versions of the Express.js web framework for Node.js may allow hackers to inject malicious code into websites by sending specially crafted requests. This could allow them to take control of user sessions or steal sensitive information. To fix this, update to Express.js version 3.11 or later, or version 4.5 or later.

What to do
  • Update jonchurch express to version 3.11.0.
  • Update jonchurch express to version 4.5.0.
Affected software
Ecosystem VendorProductAffected versions
npm jonchurch express < 3.11.0
>= 4.0.0, < 4.5.0
Fix: upgrade to 3.11.0
– openjsf express <= 3.10.5
4.0.0
4.1.0
4.1.1
4.1.2
4.2.0
4.3.0
4.3.1
4.3.2
4.4.0
4.4.1
4.4.2
3 more version ranges
cpe:2.3:a:openjsf:express:*:*:*:*:*:*:*:*
Original advisory text
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 cond...
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.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
6.1 Medium
Exploitation
1% chance of attack within 30 days
Type
CWE-79Cross-site Scripting (XSS)
Timeline
Published9 Aug 2017
Updated4 Nov 2026
First seen6 Mar 2026
Sources
GHSA-gpvr-g6gh-9mc2 · GHSA
CVE-2014-6393 · NVD
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