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CVE-2014-6393

21
FAUCET Score

CVE-2014-6393 describes a cross-site scripting (XSS) vulnerability in the Express web framework for Node.js, affecting versions before 3.11 and 4.x before 4.5. The flaw stems from the framework's failure to include a charset field in HTTP Content-Type headers for 400-level responses, potentially allowing attackers to inject malicious scripts via non-standard encodings. Rated 6.1 MEDIUM, this vulnerability has a network attack vector, low attack complexity, and requires user interaction, with potential impacts on confidentiality and integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.10.5CPE matchmatch criteria
cpe:2.3:a:openjsf:express:*:*:*:*:*:*:*:*
4.0.0CPE matchmatch criteria
cpe:2.3:a:openjsf:express:4.0.0:*:*:*:*:*:*:*
4.1.0CPE matchmatch criteria
cpe:2.3:a:openjsf:express:4.1.0:*:*:*:*:*:*:*
4.1.1CPE matchmatch criteria
cpe:2.3:a:openjsf:express:4.1.1:*:*:*:*:*:*:*
4.1.2CPE matchmatch criteria
cpe:2.3:a:openjsf:express:4.1.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.14%
Probability of exploitation in next 30 days
EPSS Percentile
63.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0114 is in the 76th percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

npmpatch availablevia ghsa
Product: expressFixed in: 3.11.0
npmpatch availablevia ghsa
Product: expressFixed in: 4.5.0
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Enterprise 2Fixed in: nodejs010-nodejs-express

Vendor Advisories (2)

npmGHSA-gpvr-g6gh-9mc2medium

No Charset in Content-Type Header in express

Oct 23, 2018
redhatCVE-2014-6393Moderate

express: cross-site scripting via content-type header

Mar 15, 2015

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party AdvisoryVDB Entry
nodesecurity.io / advisories/express-no-charset-in-content-type-header
Third Party Advisory