Today I don't know why I updated B2J contact. I am not using it anymore as it (after you guys made it a paid only plugin and didnt give any chance for us to see if paying got us some features which were missing) became a paid plugin.
My website got hacked once like a file was uploaded (a this file was hacked by "script kiddie" group) I suspected it was B2j since it had not been upgraded for a long time I just forgot to remove it.
So I uninstalled it.
Deleted the files.
Strangely today I see an update notification and it B2J was there. I just blindly click update buttons.
Then While I was updating It struck me I don't use it anymore and had removed it last month.
So as soon as it got updated I must have just spent 5 minutes on another window and then uninstalled the component.
But I guess it was too late.
Same thing happened but think time my index.php fiile was hacked and the hacked page was showing.
My hosting company disabled my website.
I cleaned the code got the website delisted and then removed B2J component.
Now its gone but I thought I should let you know.
Even after the update there is some vulnerability in B2J contact.