How severe is CVE-2021-21421?

CVE-2021-21421 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2021-21421 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21421?

CVE-2021-21421 affects Node-etsy-client Project Node-etsy-client. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21421?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-21421 published?

CVE-2021-21421 was published on 2021-04-01 and last updated on 2026-06-17.

CVE-2021-21421

CVE-2021-21421 is a high-severity vulnerability in Node-etsy-client Project Node-etsy-client with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-209.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 4.0
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-209
Affected product: Node-etsy-client Project Node-etsy-client
Published: 2021-04-01
Last modified: 2026-06-17

Description

node-etsy-client is a NodeJs Etsy ReST API Client. Applications that are using node-etsy-client and reporting client error to the end user will offer api key value too This is fixed in node-etsy-client v0.3.0 and later.

Frequently asked questions

What is CVE-2021-21421?: node-etsy-client is a NodeJs Etsy ReST API Client. Applications that are using node-etsy-client and reporting client error to the end user will offer api key value too This is fixed in node-etsy-client v0.3.0 and later.
How severe is CVE-2021-21421?: CVE-2021-21421 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2021-21421 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21421?: CVE-2021-21421 affects Node-etsy-client Project Node-etsy-client. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21421?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-21421 published?: CVE-2021-21421 was published on 2021-04-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:node-etsy-client_project:node-etsy-client:*:*:*:*:*:node.js:*:*

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