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No exploitation reportedFix available

CVE-2021-23807

No exploitation reported by the sources we read.

  • Published2021-11-03
  • Fixed in5.0.0
  • WeaknessCWE-843

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2021-11-0318:15CVE publishedNVD

Versions per branch

NVD · OSV
Janl jsonpointer
BranchAffectedFixed in
5.0< 5.0.05.0.0

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • jsonpointerTuxCare:npmfrom 1.1.0-tuxcare.0 · fixed in 1.1.0-tuxcare.1
  • jsonpointerTuxCare:npmfrom 2.0.0-tuxcare.0 · fixed in 2.0.0-tuxcare.1
  • jsonpointerTuxCare:npmfrom 4.1.0-tuxcare.0 · fixed in 4.1.0-tuxcare.2
  • nodejs-jsonpointeropenEuler:22.03-LTSall versions · fixed in 5.0.0-1.oe2203
  • nodejs-jsonpointeropenEuler:20.03-LTS-SP3all versions · fixed in 5.0.0-1.oe1
  • nodejs-jsonpointeropenEuler:20.03-LTS-SP1all versions · fixed in 5.0.0-1.oe1
  • py3.10-jsonpointerWolfiall versions · fixed in 3.0.0-r0
  • py3.10-jsonpointerChainguardall versions · fixed in 3.0.0-r0

Vendor advisories

  • CVE-2021-23807 Red Hat Product Security4 known affected

    nodejs-jsonpointer: type confusion vulnerability can lead to a bypass of a previous prototype pollution fix when the pointer components are arrays

    kibana as a component of Red Hat OpenShift Container Platform 3.11 · kibana.src as a component of Red Hat OpenShift Container Platform 3.11 · openshift4/ose-metering-hadoop as a component of Red Hat OpenShift Container Platform 4 · +1 more

Full record on NVD

Fix

  1. Update Janl jsonpointer to 5.0.0
  2. No fix planned, says the vendor Red Hat Product Security CVE-2021-23807 · 2 productsOut of support scope
  3. No fix planned, says the vendor Red Hat Product Security CVE-2021-23807 · 2 productsWill not fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.15.6known since 2026-10-23
  • NVDCVSS 3.19.8read 2026-10-23
  • NVDCVSS 2.07.5read 2026-10-23
  • NVDweakness (CWE)CWE-843read 2026-10-23
  • FIRST EPSSEPSS score2.8 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryMODERATE2021-11-04

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2021-11-03
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-282f-qqgm-c34q

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.

Is CVE-2021-23807 actively exploited?

Active exploitation of CVE-2021-23807 has not been confirmed. Its EPSS score was 2.8% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-23807?

CVE-2021-23807 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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