How severe is CVE-2021-23820?

CVE-2021-23820 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-2021-23820 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23820?

CVE-2021-23820 affects Manuelstofer Json-pointer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23820?

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

When was CVE-2021-23820 published?

CVE-2021-23820 was published on 2021-11-03 and last updated on 2026-06-17.

CVE-2021-23820

CVE-2021-23820 is a medium-severity vulnerability in Manuelstofer Json-pointer 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: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-843
Affected product: Manuelstofer Json-pointer
Published: 2021-11-03
Last modified: 2026-06-17

Description

This affects all versions of package json-pointer. A type confusion vulnerability can lead to a bypass of CVE-2020-7709 when the pointer components are arrays.

Frequently asked questions

What is CVE-2021-23820?: This affects all versions of package json-pointer. A type confusion vulnerability can lead to a bypass of CVE-2020-7709 when the pointer components are arrays.
How severe is CVE-2021-23820?: CVE-2021-23820 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-2021-23820 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23820?: CVE-2021-23820 affects Manuelstofer Json-pointer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23820?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-23820 published?: CVE-2021-23820 was published on 2021-11-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:manuelstofer:json-pointer:*:*:*:*:*:node.js:*:*

More vulnerabilities in Manuelstofer Json-pointer

CVE-2020-7709 — Medium (CVSS 6.0): This affects the package json-pointer before 0.6.1. Multiple reference of object using slash is supported.

All CVEs affecting Manuelstofer Json-pointer →

Other CWE-843 vulnerabilities

CVE-2021-33970 — Critical (CVSS 10.0): Buffer Overflow vulnerability in Qihoo 360 Chrome v13.0.2170.0 allows attacker to escalate priveleges.
CVE-2010-2299 — Critical (CVSS 10.0): The Clipboard::DispatchObject function in app/clipboard/clipboard.cc in Google Chrome before 5.0.375.70 does not…
CVE-2023-22579 — Critical (CVSS 9.9): Due to improper parameter filtering in the sequalize js library, can a attacker peform injection.
CVE-2026-13776 — Critical (CVSS 9.8): Type Confusion in Dawn in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the…
CVE-2026-43038 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: ipv6: icmp: clear skb2->cb[] in…
CVE-2025-70023 — Critical (CVSS 9.8): An issue pertaining to CWE-843: Access of Resource Using Incompatible Type was discovered in transloadit uppy v0.25.6.

Browse all CWE-843 vulnerabilities →