CVEs-PoC/2021/CVE-2021-23820.md

### [CVE-2021-23820](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23820)
![](https://img.shields.io/static/v1?label=Product&message=json-pointer&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3E%3D%200%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Prototype%20Pollution&color=brighgreen)

### Description

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.

### POC

#### Reference
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1910686
- https://snyk.io/vuln/SNYK-JS-JSONPOINTER-1577287

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/dellalibera/dellalibera
- https://github.com/upsideon/shoveler