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CVE-2021-21421

23
FAUCET Score

CVE-2021-21421 affects applications utilizing the node-etsy-client library, a Node.js Etsy ReST API client. The vulnerability, rated Medium severity (CVSS 6.5), allows for the exposure of API keys to end-users when client errors are reported, due to improper handling of sensitive information (CWE-200, CWE-209). This could lead to unauthorized access to Etsy API functionalities. The issue is resolved in node-etsy-client version 0.3.0 and later. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.3.0CPE matchmatch criteria
cpe:2.3:a:node-etsy-client_project:node-etsy-client:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.06%
Probability of exploitation in next 30 days
EPSS Percentile
61.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0106 is in the 75th percentile among its peer group of 21,958 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 0.0 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: node-etsy-clientFixed in: 0.3.0

Vendor Advisories (1)

npmGHSA-xw22-wv29-3299high

ApiKey secret could be revelated on network issue

Apr 6, 2021

References

github.com / creharmony/node-etsy-client/commit/b4beb8ef080366c1a87dbf9e163051a446acaa7d
PatchThird Party Advisory
github.com / creharmony/node-etsy-client/security/advisories/GHSA-xw22-wv29-3299
Third Party Advisory