How severe is CVE-2020-8147?

CVE-2020-8147 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-8147 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8147?

CVE-2020-8147 affects Utils-extend Project Utils-extend. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-8147?

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

When was CVE-2020-8147 published?

CVE-2020-8147 was published on 2020-04-03 and last updated on 2026-06-17.

CVE-2020-8147

CVE-2020-8147 is a critical-severity vulnerability in Utils-extend Project Utils-extend with a CVSS 3.x base score of 9.8. 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-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Utils-extend Project Utils-extend
Published: 2020-04-03
Last modified: 2026-06-17

Description

Flaw in input validation in npm package utils-extend version 1.0.8 and earlier may allow prototype pollution attack that may result in remote code execution or denial of service of applications using utils-extend.

Frequently asked questions

What is CVE-2020-8147?: Flaw in input validation in npm package utils-extend version 1.0.8 and earlier may allow prototype pollution attack that may result in remote code execution or denial of service of applications using utils-extend.
How severe is CVE-2020-8147?: CVE-2020-8147 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-8147 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8147?: CVE-2020-8147 affects Utils-extend Project Utils-extend. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-8147?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-8147 published?: CVE-2020-8147 was published on 2020-04-03 and last updated on 2026-06-17.

References

https://hackerone.com/reports/801522

Affected products (1)

cpe:2.3:a:utils-extend_project:utils-extend:*:*:*:*:*:node.js:*:*

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