CVEs-PoC/2021/CVE-2021-21004.md

### [CVE-2021-21004](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21004)
![](https://img.shields.io/static/v1?label=Product&message=FL%20NAT&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=FL%20SWITCH&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=SMCS%2016TX%20(2700996)%3C%3D%204.70%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=SMN%208TX%20(2989365)%3C%3D%204.63%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-79%20Cross-site%20Scripting%20(XSS)&color=brighgreen)

### Description

In Phoenix Contact FL SWITCH SMCS series products in multiple versions an attacker may insert malicious code via LLDP frames into the web-based management which could then be executed by the client.

### POC

#### Reference
- https://cert.vde.com/en-us/advisories/vde-2021-023

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