CVE-2021-23807
Prototype Pollution
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.
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 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.
- Record
CVE-2021-23807- 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/E:P/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-2277
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.
- Record
EUVD-2021-2277- 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/E:P/RL:O/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-282f-qqgm-c34q
Prototype Pollution in node-jsonpointer
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.
- Record
GHSA-282f-qqgm-c34q- 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 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.
- Record
CVE-2021-23807- 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
OSV
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.
- Record
CVE-2021-23807- 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 - Updated
- 2026-11-02
OSVGHSA-282f-qqgm-c34q
Prototype Pollution in node-jsonpointer
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.
- Record
GHSA-282f-qqgm-c34q- 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
Show 4 moreShow less
OSVOESA-2022-1755
nodejs-jsonpointer security update
Simple JSON Addressing.
Security Fix(es):
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.(CVE-2021-23807)
- Record
OESA-2022-1755- 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 - Updated
- 2026-11-02
OSVCLSA-2026-1772756022No score
TuxCare security update for jsonpointer (1 CVE)
TuxCare rebuilt jsonpointer to address 1 CVE. Fixed in 2.0.0-tuxcare.1.
- Record
CLSA-2026-1772756022- Updated
- 2026-11-02
OSVCLSA-2026-1773706629No score
TuxCare security update for jsonpointer (1 CVE)
TuxCare rebuilt jsonpointer to address 1 CVE. Fixed in 1.1.0-tuxcare.1.
- Record
CLSA-2026-1773706629- Updated
- 2026-11-02
OSVCLSA-2026-1773965925No score
TuxCare security update for jsonpointer (1 CVE)
TuxCare rebuilt jsonpointer to address 1 CVE. Fixed in 4.1.0-tuxcare.2.
- Record
CLSA-2026-1773965925- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
jsonpointernpm | before 5.0.0 | 5.0.0 |
org.webjars.npm:json-pointernpm | before 5.0.0 | 5.0.0 |
jsonpointerTuxCare:npm | 2.0.0-tuxcare.0 up to 2.0.0-tuxcare.1, plus listed versions 2.0.0 | 2.0.0-tuxcare.1 |
jsonpointerTuxCare:npm | 1.1.0-tuxcare.0 up to 1.1.0-tuxcare.1, plus listed versions 1.1.0 | 1.1.0-tuxcare.1 |
jsonpointerTuxCare:npm | 4.1.0-tuxcare.0 up to 4.1.0-tuxcare.2, plus listed versions 4.1.04.1.0-tuxcare.1 | 4.1.0-tuxcare.2 |
nodejs-jsonpointeropenEuler:20.03-LTS-SP1 | before 5.0.0-1.oe1 | 5.0.0-1.oe1 |
nodejs-jsonpointeropenEuler:20.03-LTS-SP3 | before 5.0.0-1.oe1 | 5.0.0-1.oe1 |
nodejs-jsonpointeropenEuler:22.03-LTS | before 5.0.0-1.oe2203 | 5.0.0-1.oe2203 |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| 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-2021-23807 is a medium vulnerability (CVSS 5.6) in Janl Jsonpointer, published November 3, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.75%, the 86th percentile. Fixed in jsonpointer 5.0.0.
References
snyk.io/vuln/SNYK-JS-JSONPOINTER-1577288
github.com/janl/node-jsonpointer/pull/51
nvd.nist.gov/vuln/detail/CVE-2021-23807
openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1755