[zbobet2012]

Or you know, anyone who wants to plant material on a device and has physical access. Say a disgruntled employee before leaving, or ex, or criminal or...

Or anyone who can just text you since imessage backs up to icloud automatically...

[jeromegv]

While iMessage backups to iCloud, this measure is only for photos stored in the iCloud Photo Library. So sending a text with the photo is not enough.