CVE-2021-23820
Prototype Pollution
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Prototype Pollution
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.
- Record
CVE-2021-23820- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
EUVDEUVD-2021-2394
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.
- Record
EUVD-2021-2394- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-v5vg-g7rq-363w
Prototype Pollution in json-pointer
This affects versions of package json-pointer up to and including 0.6.1. A type confusion vulnerability can lead to a bypass of CVE-2020-7709 when the pointer components are arrays.
- Record
GHSA-v5vg-g7rq-363w- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-843, CWE-1321
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2021-23820- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-843
- Updated
- 2026-11-02
OSVGHSA-v5vg-g7rq-363w
Prototype Pollution in json-pointer
This affects versions of package json-pointer up to and including 0.6.1. A type confusion vulnerability can lead to a bypass of CVE-2020-7709 when the pointer components are arrays.
- Record
GHSA-v5vg-g7rq-363w- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-1321, CWE-843
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
json-pointernpm |
through 0.6.1 | 0.6.2 |
json-pointernpm |
before 0.6.2 | 0.6.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-23820 is a medium vulnerability (CVSS 5.6) in Manuelstofer Json-pointer, published November 3, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.87%, the 79th percentile. Fixed in json-pointer 0.6.2.
References
snyk.io/vuln/SNYK-JS-JSONPOINTER-1577287
github.com/manuelstofer/json-pointer/blob/master/index.js%23L78
nvd.nist.gov/vuln/detail/CVE-2021-23820