M5StickC - MQTT - Firewall

[fhermes]

Hi, this is Frank.

we are currently testing a M5StickC with UIFlow 1.7.8 (local).
We try to connect your stick with our MQTT Mosquitto Server behind a firewall. The Traffic will be currently blocked with following message:

Host xx.xx.xx.xx was seen flooding requests towards xx.xx.xx.xx via port 1883 or used for Message Queuing Telemetry Transport Protocol (MQTT). Signature implies that target may be potentially running vulnerable Mongoose version (6.15 or prior).

I like to know, is M5Stack using Mongoose behind the UIFlow? If yes which version? Did have other people same issue?

Thanks in Advanced