Twitter Inc. has confessed to some an event that email addresses and phone numbers uploaded by users could have been ‘inadvertently’ used for advertising purposes. Twitter said when advertisers uploaded their marketing lists, it may have matched people on the platform to their list based on the email or phone number provided by account holders.

The company’s Blog post says cryptically, ”This was an error and we apologize.”

This leak occurred some time ago but was plugged on September 17th, and the brand has not disclosed how many were affected by it.

The revelation is coming at a time when most Social media companies are facing heat from users and regulators globally on how their platforms handle user data.

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