`A security vulnerability, spam, on Icegram?

I have one of my sites that uses icegram. I have just discovered a whole series of campaigns produced in recent days on icegram, published under the name of one of the users who only have a subscriber role.

I could make a mistake, the hacking could possibly come from elsewhere on the site but I will let you know if an update needs to be done urgently or an alert to be broadcast.
(Google translation….)

Dominique (France)`