Hi Jose
Thanks very much for the very helpful reply.
Following your advice, I searched the database for “mfbfw” and, although no mention of iFrames, there was a couple of references to iPhones and iPad cookies. I basically deleted any table rows that contained “mfbfw” and the mobile versions of our website stopped being redirected to porn.
Just to be sure, I reinstalled Fancybox for WordPress and checked the database. The two entries for “mfbfw” looked totally legit. I then went to the Uninstall Tab and checked the “Remove Settings when plugin is deactivated from the “Manage Plugins” page.” option and Deactivated the Plugin. Searching the database found no references to “mfbfw”. So, reset settings is also an option.
Thanks you very much for staying on top of this. I only wish I had been aware of this issue in February when it first occurred. If anyone can point me in the direction of a feed that warns WordPress users of such issues I would appreciate it.
Best regards
David