How severe is CVE-2021-4229?

CVE-2021-4229 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2021-4229 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-4229?

CVE-2021-4229 primarily affects Ua-parser-js Project Ua-parser-js. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-4229?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-4229 published?

CVE-2021-4229 was published on 2022-05-24 and last updated on 2026-06-17.

CVE-2021-4229

CVE-2021-4229 is a medium-severity vulnerability in Ua-parser-js Project Ua-parser-js with a CVSS 3.x base score of 5.0. 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-829.

Key facts

Severity: Medium (CVSS 3.x base score 5.0)
CVSS v2: 7.6
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-829
Affected product: Ua-parser-js Project Ua-parser-js
Published: 2022-05-24
Last modified: 2026-06-17

Description

A vulnerability was found in ua-parser-js 0.7.29/0.8.0/1.0.0. It has been rated as critical. This issue affects the crypto mining component which introduces a backdoor. Upgrading to version 0.7.30, 0.8.1 and 1.0.1 is able to address this issue. It is recommended to upgrade the affected component.

Frequently asked questions

What is CVE-2021-4229?: A vulnerability was found in ua-parser-js 0.7.29/0.8.0/1.0.0. It has been rated as critical. This issue affects the crypto mining component which introduces a backdoor. Upgrading to version 0.7.30, 0.8.1 and 1.0.1 is able to address this issue. It is recommended to upgrade the affected component.
How severe is CVE-2021-4229?: CVE-2021-4229 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2021-4229 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-4229?: CVE-2021-4229 primarily affects Ua-parser-js Project Ua-parser-js. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-4229?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-4229 published?: CVE-2021-4229 was published on 2022-05-24 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:ua-parser-js_project:ua-parser-js:0.7.29:*:*:*:*:node.js:*:*
cpe:2.3:a:ua-parser-js_project:ua-parser-js:0.8.0:*:*:*:*:node.js:*:*
cpe:2.3:a:ua-parser-js_project:ua-parser-js:1.0.0:*:*:*:*:node.js:*:*

More vulnerabilities in Ua-parser-js Project Ua-parser-js

CVE-2021-27292 — High (CVSS 7.5): ua-parser-js >= 0.7.14, fixed in 0.7.24, uses a regular expression which is vulnerable to denial of service. If an…
CVE-2020-7793 — High (CVSS 7.5): The package ua-parser-js before 0.7.23 are vulnerable to Regular Expression Denial of Service (ReDoS) in multiple…
CVE-2020-7733 — High (CVSS 7.5): The package ua-parser-js before 0.7.22 are vulnerable to Regular Expression Denial of Service (ReDoS) via the regex for…
CVE-2022-25927 — Medium (CVSS 5.3): Versions of the package ua-parser-js from 0.7.30 and before 0.7.33, from 0.8.1 and before 1.0.33 are vulnerable to…

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