For the second time this week, and the umpteenth time in the past 12 months, Facebook has made the news due to a massive privacy blunder. In an unwelcome sequel to a March statement by the company that it had stored between 200 million and 600 million plain text user account passwords for years, the social media giant admitted that it has “discovered additional logs of Instagram passwords being stored in a readable format.”

Facebook estimates that “millions” of Instagram users are affected, but has not provided an exact number. Just like last month, the company stated that the exposed passwords were “not internally abused or improperly accessed” and that affected users will be informed about the incident.

Read more: Facebook admits to storing plaintext passwords for millions of Instagram user