CVEs-PoC/2021/CVE-2021-27657.md

### [CVE-2021-27657](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27657)
![](https://img.shields.io/static/v1?label=Product&message=Metasys&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=11.0%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-269%20Improper%20Privilege%20Management&color=brightgreen)

### Description

Successful exploitation of this vulnerability could give an authenticated Metasys user an unintended level of access to the server file system, allowing them to access or modify system files by sending specifically crafted web messages to the Metasys system. This issue affects: Johnson Controls Metasys version 11.0 and prior versions.

### POC

#### Reference
- https://www.johnsoncontrols.com/cyber-solutions/security-advisories

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