Washington Post

Twitter says users' phone numbers provided for security 'inadvertently' used for ad purposes

Adding to Twitter's potential troubles, the company finalized an agreement with the FTC in 2011 that alleged the company failed to protect users from security threats. Foto: Christoph Schmidt/picture-alliance/dpa/AP Images Foto: Christoph Schmidt/picture-alliance/dpa/AP

Twitter said Tuesday that it may have mishandled an unspecified number of users' email addresses and phone numbers, allowing that data to be used "inadvertently" for advertising purposes.

The incident marks the latest security mishap for the social-networking company, but one that could carry with it some legal headaches. Federal regulators penalized Facebook earlier this year for a similar situation...

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