IT Blog

SAN FRANCISCO (Reuters) – Twitter said on Monday that it had discovered attempts by possible state actors to access the phone numbers associated with user accounts, after a security researcher unearthed a flaw in the company’s “contacts upload” feature.

In a statement published on its privacy blog, Twitter said it had identified a “high volume of requests” to use the feature coming from IP addresses in Iran, Israel and Malaysia. It said, without elaborating, that “some of these IP addresses may have ties to state-sponsored actors.”

A company spokeswoman declined to say how many user phone numbers had been exposed, saying Twitter was unable to identify all of the accounts that may have been impacted.

She said Twitter suspected a possible connection to state-backed actors because the attackers in Iran appeared to have had…