How severe is CVE-2019-20149?

CVE-2019-20149 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2019-20149 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-20149?

CVE-2019-20149 affects Kind-of Project Kind-of. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-20149?

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-2019-20149 published?

CVE-2019-20149 was published on 2019-12-30 and last updated on 2026-06-17.

CVE-2019-20149

CVE-2019-20149 is a high-severity vulnerability in Kind-of Project Kind-of with a CVSS 3.x base score of 7.5. 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-668.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-668
Affected product: Kind-of Project Kind-of
Published: 2019-12-30
Last modified: 2026-06-17

Description

ctorName in index.js in kind-of v6.0.2 allows external user input to overwrite certain internal attributes via a conflicting name, as demonstrated by 'constructor': {'name':'Symbol'}. Hence, a crafted payload can overwrite this builtin attribute to manipulate the type detection result.

Frequently asked questions

What is CVE-2019-20149?: ctorName in index.js in kind-of v6.0.2 allows external user input to overwrite certain internal attributes via a conflicting name, as demonstrated by 'constructor': {'name':'Symbol'}. Hence, a crafted payload can overwrite this builtin attribute to manipulate the type detection result.
How severe is CVE-2019-20149?: CVE-2019-20149 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2019-20149 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-20149?: CVE-2019-20149 affects Kind-of Project Kind-of. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-20149?: 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-2019-20149 published?: CVE-2019-20149 was published on 2019-12-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:kind-of_project:kind-of:6.0.2:*:*:*:*:*:*:*

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