CVE-2021-23820: This affects all versions of package json-pointer

This week

MEDIUM 5.6REMOTEUPGRADE

CVE-2021-23820 is a medium-severity flaw (CVSS 5.6) affecting json-pointer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.6 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 21%)
CISA exploited list	No
Weakness	CWE-843
Published	2021-11-03
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: manuelstofer

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-11-03 18:15 UTCPublished CVE record published
2026-06-17 03:38 UTCUpdated Record last modified

manuelstofer json-pointer UPGRADE

Affected: < 0.6.2

Fixed in: 0.6.2

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls json-pointer

2. UPGRADE to 0.6.2

npm install json-pointer@">=0.6.2"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-23820?

json-pointer: upgrade to 0.6.2. Exact commands for each OS are on this page.

Is CVE-2021-23820 being exploited?

CVE-2021-23820 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-23820 affect?

CVE-2021-23820 affects json-pointer. Severity is medium (CVSS 5.6). 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 urgent is CVE-2021-23820?

Priority 49/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2022-4742 MEDIUM 6.3 UPGRADE A vulnerability, which was classified as critical, has been found in json-pointer up to 0.6.1
CVE-2020-7709 MEDIUM 6.0 UPGRADE This affects the package json-pointer before 0.6.1

References

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