How severe is CVE-2021-23395?

CVE-2021-23395 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-2021-23395 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23395?

CVE-2021-23395 affects Nedb Project Nedb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23395?

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-2021-23395 published?

CVE-2021-23395 was published on 2021-06-15 and last updated on 2026-06-17.

CVE-2021-23395

CVE-2021-23395 is a high-severity vulnerability in Nedb Project Nedb 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: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1321
Affected product: Nedb Project Nedb
Published: 2021-06-15
Last modified: 2026-06-17

Description

This affects all versions of package nedb. The library could be tricked into adding or modifying properties of Object.prototype using a __proto__ or constructor.prototype payload.

Frequently asked questions

What is CVE-2021-23395?: This affects all versions of package nedb. The library could be tricked into adding or modifying properties of Object.prototype using a __proto__ or constructor.prototype payload.
How severe is CVE-2021-23395?: CVE-2021-23395 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-2021-23395 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23395?: CVE-2021-23395 affects Nedb Project Nedb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23395?: 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-2021-23395 published?: CVE-2021-23395 was published on 2021-06-15 and last updated on 2026-06-17.

References

https://snyk.io/vuln/SNYK-JS-NEDB-1305279

Affected products (1)

cpe:2.3:a:nedb_project:nedb:*:*:*:*:*:node.js:*:*

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