CVEs-PoC/2021/CVE-2021-4074.md

### [CVE-2021-4074](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4074)
![](https://img.shields.io/static/v1?label=Product&message=WHMCS%20Bridge&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=6.1%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-79%20Cross-site%20Scripting%20(XSS)&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-862%20Missing%20Authorization&color=brightgreen)

### Description

The WHMCS Bridge WordPress plugin is vulnerable to Stored Cross-Site Scripting via the cc_whmcs_bridge_url parameter found in the ~/whmcs-bridge/bridge_cp.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 6.1. Due to missing authorization checks on the cc_whmcs_bridge_add_admin function, low-level authenticated users such as subscribers can exploit this vulnerability.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/20142995/nuclei-templates