CVE-2021-23820

Name: CVE-2021-23820
Creator: NVD / NIST
Published: 2021-11-03T18:15:08.287+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.81%

Last modified Jun 17, 2026

CVE-2021-23820 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 1.81% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.81%

75.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-843

Affected Software

Vendor	Product	Versions
Manuelstofer	Json-Pointer	< 0.6.2

References

https://github.com/manuelstofer/json-pointer/blob/master/index.js%23L78Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1910686Exploit, Mitigation, Patch, Third Party Advisory, VDB Entry
https://snyk.io/vuln/SNYK-JS-JSONPOINTER-1577287Exploit, Mitigation, Patch, Third Party Advisory, VDB Entry
https://github.com/manuelstofer/json-pointer/blob/master/index.js%23L78Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1910686Exploit, Mitigation, Patch, Third Party Advisory, VDB Entry
https://snyk.io/vuln/SNYK-JS-JSONPOINTER-1577287Exploit, Mitigation, Patch, Third Party Advisory, VDB Entry

Timeline

Published: Nov 3, 2021
Last Modified: Jun 17, 2026
Status: Analyzed

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 score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.81% probability of exploitation in the next 30 days.

How do I fix CVE-2021-23820?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-23820?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST