PT-2021-7248 · Npm · Json-Pointer

Alessio Della Libera · Published 2021-11-03 · Updated 2025-07-02 · CVE-2021-23820

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions json-pointer versions up to and including 0.6.1

Description A type confusion issue in the json-pointer package can lead to a bypass when the pointer components are arrays. This can potentially allow a remote attacker to execute arbitrary code or cause a denial of service. The issue is related to errors in mixing data types.

Recommendations For versions up to and including 0.6.1, update to a version that fixes this issue. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Prototype Pollution

Type Confusion

Weakness Enumeration

CWE-915

CWE-1321

CWE-843

Related Identifiers

BDU:2022-04137

CVE-2021-23820

GHSA-V5VG-G7RQ-363W

SNYK-JAVA-ORGWEBJARSNPM-1910686

SNYK-JS-JSONPOINTER-1577287

Affected Products

Json-Pointer

References · 15

• 🔥 https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1910686 · Exploit
• 🔥 https://snyk.io/vuln/SNYK-JS-JSONPOINTER-1577287 · Exploit
• https://bdu.fstec.ru/vul/2022-04137 · Security Note
• https://osv.dev/vulnerability/CVE-2021-23820 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-23820 · Security Note
• https://osv.dev/vulnerability/GHSA-v5vg-g7rq-363w · Vendor Advisory
• https://github.com/manuelstofer/json-pointer/pull/36 · Note
• https://github.com/manuelstofer/json-pointer/blob/master/index.js%23L78 · Note
• https://github.com/manuelstofer/json-pointer · Note
• https://github.com/manuelstofer/json-pointer/commit/931b0f9c7178ca09778087b4b0ac7e4f505620c2 · Note
• https://github.com/manuelstofer/json-pointer/blob/master/index.js#23L78 · Note
• https://twitter.com/dailycve/status/1940202602740031665 · Twitter Post
• https://bugzilla.redhat.com/show_bug.cgi?id=2020369 · Note
• https://github.com/advisories/GHSA-v5vg-g7rq-363w · Note
• https://t.me/cibsecurity/31764 · Telegram Post