Twitter has stated it used telephone numbers and e mail addresses, supplied by customers to arrange two-factor authentication on their accounts, to serve focused adverts.
In a disclosure Tuesday, the social media big stated it didn’t know what number of customers had been impacted.
The problem stemmed from the corporate’s tailored audiences program, which permits firms to focus on ads towards their very own advertising and marketing lists, similar to telephone numbers and e mail addresses. However Twitter discovered that when advertisers uploaded their advertising and marketing lists, it matched Twitter customers to the telephone numbers and e mail addresses customers submitted to arrange two-factor authentication on their account.
The problem was addressed as of September 17, the disclosure stated.
Twitter finds itself in the identical boat as Fb, which last year was caught utilizing customers’ telephone numbers and e mail addresses, which they gave Fb for securing their accounts, for focused promoting.
For its half, Twitter stated its advert concentrating on was “an error” and apologized.
It’s the newest in a lot of safety lapses at Twitter prior to now 12 months. Final 12 months, the corporate admitted to storing passwords in plaintext, disclosed a telephone quantity leak bug regardless of knowing about it for two years, and confirmed a location data leak in May.