A warning word

Sadly, it seems to be someone who uses the extension for force log in or if it is the creator himself who does it. I can not code but installed plugins on two different websites. Someone is trying to get in the back door with the username NoneNone via android. Every hour someone or something logs on. uninstalled ultra community on a website and then it disappeared. Have done it on my other page as well and it seems to end here as well. Warning in other words for this plugin