Sunday’s revelations indicated that the data of at least 400 million Twitter users was hacked and offered for sale on the dark web.

According to reports, the stolen material contains information concerning, among others, the World Health Organization (WHO), the National Aeronautics and Space Administration (NASA), and the Ministry of Information and Broadcasting.

The stolen material includes sensitive information such as user names, email addresses, and phone numbers.

According to sources, the hacker claiming to have stolen the data has offered Twitter a deal.

Using Twitter, he wrote: “If you are Twitter or Elon Musk and you are reading this, you are already at risk of GDPR fines for leaking the data of more than 54 million users. Now there are penalties for the data exposure of 400 million people.” He advised Twitter to exercise caution.

In addition to this, the hacker has offered to sell the data. He stated that he is willing to negotiate with any intermediary. Experts speculate that this data leak may have been caused by a weakness in the API.