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CVE-2018-14731

26
FAUCET Score

CVE-2018-14731 describes an information disclosure vulnerability in Parcel's HMRServer.js, affecting parcel-bundler. The WebSocket server, used for Hot Module Replacement, fails to validate the origin of incoming requests, allowing attackers to steal a developer's code. This vulnerability has a CVSS score of 7.5 (High), indicating a network-based attack with low complexity that can lead to high confidentiality impact without requiring user interaction or privileges. While the EPSS score is low and there's no evidence of active exploitation, public exploit code, or significant community discussion, the potential for sensitive code exposure remains a concern.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:parceljs:parcel:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.33%
Probability of exploitation in next 30 days
EPSS Percentile
81.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0233 is in the 67th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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 (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: parcel-bundlerFixed in: 1.10.0

Vendor Advisories (1)

npmGHSA-37q6-576q-vgr7high

Missing Origin Validation in parcel-bundler

Oct 30, 2018

References

blog.cal1.cn / post/Sniffing%20Codes%20in%20Hot%20Module%20Reloading%20Messages
ExploitThird Party Advisory
github.com / parcel-bundler/parcel/issues/1783
Vendor Advisory
github.com / parcel-bundler/parcel/pull/1794
ExploitPatchVendor Advisory