Twitter said on Tuesday that email addresses and phone numbers uploaded by users to meet the social media firm’s security requirements may have been ‘inadvertently’ used for advertising purposes.
The micro-blogging site said the issue was rectified as of Sept. 17, without disclosing how many users were impacted, Reuters reports.
“This was an error and we apologize,” the company was quoted as saying in a blog post.
According to Twitter, 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 said the information was not shared with third parties, but was made available internally to allow users to receive targeted advertising.
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