How severe is CVE-2021-23807?

CVE-2021-23807 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-2021-23807 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23807?

CVE-2021-23807 affects Janl Jsonpointer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23807?

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

When was CVE-2021-23807 published?

CVE-2021-23807 was published on 2021-11-03 and last updated on 2026-06-17.

CVE-2021-23807

CVE-2021-23807 is a medium-severity vulnerability in Janl Jsonpointer 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-843.

Key facts

Severity: Medium (CVSS 3.x base score 5.6)
CVSS v2: 7.5
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-843
Affected product: Janl Jsonpointer
Published: 2021-11-03
Last modified: 2026-06-17

Description

This affects the package jsonpointer before 5.0.0. A type confusion vulnerability can lead to a bypass of a previous Prototype Pollution fix when the pointer components are arrays.

Frequently asked questions

What is CVE-2021-23807?: This affects the package jsonpointer before 5.0.0. A type confusion vulnerability can lead to a bypass of a previous Prototype Pollution fix when the pointer components are arrays.
How severe is CVE-2021-23807?: CVE-2021-23807 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-2021-23807 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23807?: CVE-2021-23807 affects Janl Jsonpointer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23807?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-23807 published?: CVE-2021-23807 was published on 2021-11-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:janl:jsonpointer:*:*:*:*:*:node.js:*:*

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