Instagram, which has more than 700 million users worldwide, encouraged users to be "extra vigilant" about account security. It also suggested users enable two-factor authentication. Though, it's not clear a lack of vigilance on the part of users is to blame.
From the available information, it appears to affect a relatively small number of users. At least, compared to massive events like the hack Yahoo revealed late last year.
"High-profile Instagram users" may have been the target, but the bug was presumably not limited to verified users. The recommended security measures are good advice for all users, whether or not they have a blue checkmark by their handle.
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