<p>Twitter Inc said on Tuesday email addresses and phone numbers uploaded by users to meet its security requirements may have been 'inadvertently' used for advertising purposes.</p>.<p>The micro-blogging site said the issue was rectified as of Sept. 17, without disclosing how many users were impacted.</p>.<p>"This was an error and we apologize," the company said in a blog post. </p>.<p>Social media companies, including Twitter and Facebook, have faced heat from users and regulators globally on how their platforms handle user data.</p>.<p>Twitter said when advertisers uploaded their marketing lists, it may have matched people on Twitter to their list based on the email or phone number the Twitter account holder provided. </p>
<p>Twitter Inc said on Tuesday email addresses and phone numbers uploaded by users to meet its security requirements may have been 'inadvertently' used for advertising purposes.</p>.<p>The micro-blogging site said the issue was rectified as of Sept. 17, without disclosing how many users were impacted.</p>.<p>"This was an error and we apologize," the company said in a blog post. </p>.<p>Social media companies, including Twitter and Facebook, have faced heat from users and regulators globally on how their platforms handle user data.</p>.<p>Twitter said when advertisers uploaded their marketing lists, it may have matched people on Twitter to their list based on the email or phone number the Twitter account holder provided. </p>