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The Guardian - US
The Guardian - US
Technology
Kari Paul

Twitter whistleblower tells Senate of ‘egregious’ security failings by company

A man stares at the camera from the end of a hallway.
Peiter Zatko, also known as Mudge, begins his congressional testimony on Tuesday. Photograph: The Washington Post/Getty Images

A Twitter whistleblower who accused the company of “egregious” security deficiencies testified in front of Congress on Tuesday, alleging those failures made the platform vulnerable to exploitation, including by foreign agents.

Former hacker Peiter “Mudge” Zatko worked as head of security at Twitter from 2020 until he was fired in 2022, and says in that time he witnessed “extreme, egregious deficiencies by Twitter in every area of his mandate”.

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