How severe is CVE-2021-23396?

CVE-2021-23396 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2021-23396 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23396?

CVE-2021-23396 affects Lutils Project Lutils. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23396?

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

When was CVE-2021-23396 published?

CVE-2021-23396 was published on 2021-06-17 and last updated on 2026-06-17.

CVE-2021-23396

CVE-2021-23396 is a medium-severity vulnerability in Lutils Project Lutils with a CVSS 3.x base score of 5.6. 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: Medium (CVSS 3.x base score 5.6)
CVSS v2: 7.5
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1321
Affected product: Lutils Project Lutils
Published: 2021-06-17
Last modified: 2026-06-17

Description

All versions of package lutils are vulnerable to Prototype Pollution via the main (merge) function.

Frequently asked questions

What is CVE-2021-23396?: All versions of package lutils are vulnerable to Prototype Pollution via the main (merge) function.
How severe is CVE-2021-23396?: CVE-2021-23396 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2021-23396 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23396?: CVE-2021-23396 affects Lutils Project Lutils. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23396?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-23396 published?: CVE-2021-23396 was published on 2021-06-17 and last updated on 2026-06-17.

References

https://snyk.io/vuln/SNYK-JS-LUTILS-1311023

Affected products (1)

cpe:2.3:a:lutils_project:lutils:*:*:*:*:*:node.js:*:*

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