How severe is CVE-2022-21803?

CVE-2022-21803 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2022-21803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-21803?

CVE-2022-21803 affects Nconf Project Nconf. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-21803?

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-2022-21803 published?

CVE-2022-21803 was published on 2022-04-12 and last updated on 2026-06-17.

CVE-2022-21803

CVE-2022-21803 is a high-severity vulnerability in Nconf Project Nconf with a CVSS 3.x base score of 7.3. 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-1321.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 5.0
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1321
Affected product: Nconf Project Nconf
Published: 2022-04-12
Last modified: 2026-06-17

Description

This affects the package nconf before 0.11.4. When using the memory engine, it is possible to store a nested JSON representation of the configuration. The .set() function, that is responsible for setting the configuration properties, is vulnerable to Prototype Pollution. By providing a crafted property, it is possible to modify the properties on the Object.prototype.

Frequently asked questions

What is CVE-2022-21803?: This affects the package nconf before 0.11.4. When using the memory engine, it is possible to store a nested JSON representation of the configuration. The .set() function, that is responsible for setting the configuration properties, is vulnerable to Prototype Pollution. By providing a crafted property, it is possible to modify the properties on the Object.prototype.
How severe is CVE-2022-21803?: CVE-2022-21803 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2022-21803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-21803?: CVE-2022-21803 affects Nconf Project Nconf. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-21803?: 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-2022-21803 published?: CVE-2022-21803 was published on 2022-04-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nconf_project:nconf:*:*:*:*:*:node.js:*:*

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