cve/2021/CVE-2021-4226.md

### [CVE-2021-4226](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4226)
![](https://img.shields.io/static/v1?label=Product&message=RSFirewall!&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%200%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-639%20Authorization%20Bypass%20Through%20User-Controlled%20Key&color=brighgreen)

### Description

RSFirewall tries to identify the original IP address by looking at different HTTP headers. A bypass is possible due to the way it is implemented.

### POC

#### Reference
- https://wpscan.com/vulnerability/c0ed80c8-ebbf-4ed9-b02f-31660097c352

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