The "vulnerability" part doesn't seem to be substantiated. From wikipedia:
>The images were initially believed to have been obtained via a breach of Apple's cloud services suite iCloud,[1][2] or a security issue in the iCloud API which allowed them to make unlimited attempts at guessing victims' passwords.[3][4] Apple claimed in a press release that access was gained via spear phishing attacks.[5][6]
Regardless of their security practices, it's a stretch to equate getting hacked with knowingly making available data. Moreover you can opt out of icloud backup, unlike with whatever is happening with apps mentioned in the OP.
>The images were initially believed to have been obtained via a breach of Apple's cloud services suite iCloud,[1][2] or a security issue in the iCloud API which allowed them to make unlimited attempts at guessing victims' passwords.[3][4] Apple claimed in a press release that access was gained via spear phishing attacks.[5][6]
Regardless of their security practices, it's a stretch to equate getting hacked with knowingly making available data. Moreover you can opt out of icloud backup, unlike with whatever is happening with apps mentioned in the OP.