Cyber Resilience

CVE-2021-23807

MediumPublic PoC

Published: 03 November 2021

Published
03 November 2021
Modified
05 March 2025
KEV Added
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Patch
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CVSS Score v3.1 5.6 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS Score 0.0017 38.2th percentile
Risk Priority 11 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-23807 is a medium-severity Type Confusion (CWE-843) vulnerability in Janl Jsonpointer. Its CVSS base score is 5.6 (Medium).

Operationally, ranked at the 38.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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.

CWE(s)
CWE-843

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

janl
jsonpointer
≤ 5.0.0

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References