Wired writer Mat Honan had his iPhone, iPad and MacBook Air remote wiped after a hacker gained access to his iCloud account.
It was found that the hackers had breached the account by calling up customer services, using a loophole in Apple's Applecare and Amazon's tech support systems.
Honan found that a new credit card had been added to his Amazon account, after the hackers had gained accessed to his name, email address and billing address.
Online retail giant Amazon has imposed a similar lockdown after the breach.
The hackers had phoned up Apple, impersonating Honan, and reported that they could not access the account and needed the password to be reset due to the change in credit card.
Whilst they were unable to answer Honan's security questions, the hackers were still able to get a temporary password to access the account, which has spread concern among other users.
The hackers wiped Honan's iPhone, iPad and MacBook, as well as breached his .Me email account, giving them access to his Google account, which they also wiped.
His personal and Gizmodo Twitter feeds (Honan previously worked at Gizmodo) were then hit, both becoming platforms for racist and homophobic messages.
Speaking to Wired, an unnamed Apple source said that the block on over-the-phone AppleID password resets was part of an overhaul of the firm's security policy around iCloud accounts.
They said that this would last at least 24 hours. Users are now being directed to the iforgot.apple.com site to change their AppleID passwords over the web instead.
Amazon has also implemented the freeze, with a spokesperson telling CNET: "We have investigated the reported exploit and can confirm that the exploit has been closed as of yesterday afternoon."
This means that users can no longer make changes to their Apple and Amazon accounts over the phone until further notice, while both firms improve their security.