I fear that Apple won't even acknowledge thisnissue unless it affects a large amount of users or gains some media attention.
I myself just sent a tip to Ars Technica hoping they will pick up the story and do some more digging around for us, because Apple sure does not have a good track record regarding transparency with major issues (antennagate anyone?).
And considering that this could be way bigger regarding the fact that peiple might have been able to geolocate each affected user, view their documents and photos etc. I really think that more attention to this issue is the only way to help break Apple's seal of silence.
I've put some thought into this and I really only see two viable options as tonhow this could have happend on my part :
1. iCloud is (or for a short time was) breached and people were able to take advantage of that
2. Some sort of malicious website visited from an iOS device was able to extract this information due to a flaw in the software somewhere.
If others have suggestions of their own, please share - I think our best bet now is to share our thoughts and maybe together we can uncover some relevant info about how this could happen.
As for me - no more iCloud!