Strange Popup ads which make browsing the forum impossible

[Rashmun]

I am an ordinary member of the forum http://such.forumotion.com (the Admin of this forum is no longer active on this forum); i have been on this forum for a few years now. In the last few days i am seeing some strange popup ads which make it impossible to browse the forum. I am on a Mac using OS X El Capitan 10.11.5 and i am seeing these popup ads when i am on safari. i don't see them when using firefox.
Additionally, i have a second Mac computer (also running OS X El Capitan 10.11.5) which i have not been using for browsing this forum. When i browsed the forum on the second Mac yesterday to experiment there were no popups and hence no problem browsing the forum. I wonder whether the forumotion advertisement at the top center of the forumotion page website (and apparently working with the help of Adobe Flash) has somehow installed something locally on the Mac on which i am seeing the popups. If yes, it may have been installed in one of the folders pertaining to safari which is not getting deleted when i am emptying the cache and removing all website data.

At any rate i am giving the screenshots pertaining to the problem i am seeing because of which i am unable to browse the forumotion forum http://such.forumotion.com when using safari on one of my two mac computers both of which are running on OS X El Capitan 10.11.5.

[Ape]

Hello Than you for getting in touch with us on this matter right now we are getting lots of posts about strange ad's and popups! Have you installed any codes in your forum in the last 3 weeks if yes then it could be down to an address on that code.

Try logging in your forum by your forum founders tools and remove all the codes added and see if you still get the problem.

if we get any more posts about this same thing then i will mark it as need attention of the head office

[Rashmun]

Hello Than you for getting in touch with us on this matter right now we are getting lots of posts about strange ad's and popups! Have you installed any codes in your forum in the last 3 weeks if yes then it could be down to an address on that code.

Try logging in your forum by your forum founders tools and remove all the codes added and see if you still get the problem.

if we get any more posts about this same thing then i will mark it as need attention of the head office

Unfortunately i don't have Admin power over the forum http://such.forumotion.com. The Admin of this forum is currently inactive, although the forum is active.

I do have Admin power on another forumotion forum and that is http://sulekha.forumotion.com ; now in this forum i have not installed any codes for more than an year. But i am experiencing the exact same problem which i have described in my original message.

[Ape]

ok i will make a report about this to our team but i am not sure its anything to do with us but as to make sure i will make my report.

We will get back to you on this matter as soon as we have more news.

I take it your using a Apple phone or tablet.
is this correct ?

[Rashmun]

i am using a 2015 Macbook Pro laptop which is running on OS X El Capitan 10.11.5. And this issue is being seen on Safari on this laptop, not on firefox. I had been browsing the forum http://such.forumotion.com regularly using this computer for more than an year.

I have another older Macbook Pro laptop which i have not used to browse this forum for more than an year. This laptop also is running on OS X El Capitan 10.11.5. There is no problem in accessing the forum using safari using this second laptop ( i tried accessing the forum just to experiment).

i called Apple Care about this and they advised me to avoid forumotion forums completely since these popup messages are only showing up on my new laptop when i visit a forumotion motion.

[Ape]

Thank you for your Full report i have sent this on to our Team and i Hope some one will read my report tomorrow and out team will run some tests

[Rashmun]

Update: i am seeing the problem on Firefox also now. its a different scary looking popup with a loud voice message on Firefox.

[Rashmun]

Update: The OS on my new Macbook Pro was OS X El Capitan 10.11.5

Today i installed OS X El Capitan 10.11.6 ; this new update to El Capitan became available only today. The problematic popups are not to be seen anymore (so far).