cve/2021/CVE-2021-23543.md

### [CVE-2021-23543](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23543)
![](https://img.shields.io/static/v1?label=Product&message=realms-shim&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=Sandbox%20Bypass&color=brighgreen)

### Description

All versions of package realms-shim are vulnerable to Sandbox Bypass via a Prototype Pollution attack vector.

### POC

#### Reference
- https://snyk.io/vuln/SNYK-JS-REALMSSHIM-2309908

#### Github
No PoCs found on GitHub currently.