Twitter’s former security chief testified before Congress Tuesday and warned of major security flaws on the social media platform. Peiter “Mudge” Zatko told lawmakers that China and India had agents working inside Twitter and that the company’s security protocols were inadequate.

Peiter Zatko: “What I discovered when I joined Twitter was that this enormously influential company was over a decade behind industry security standards. The company’s cybersecurity failures make it vulnerable to exploitation, causing real harm to real people. And when an influential media platform can be compromised by teenagers, thieves and spies, and the company repeatedly creates security problems on their own, this is a big deal for all of us.”