So bullet point # 225 from that complaint basically says the same as the PDF we're discussing:
>Likewise, Equifax “protected” one of its portals used to manage credit disputes with the username ‘admin’ and password ‘admin.’ This portal allowed access to a vast cache of personal information, including employee names, emails, usernames, passwords, consumer complaint records, and the Argentinian equivalent of Social Security numbers. The portal also granted administrative access allowing intruders to add, delete, or modify records. A November 15, 2017 article in Forbes quoted cybersecurity expert Wes Moehlenbruck, who stated that this was one of many “very grossly negligent security practices” at Equifax. The article continued, “‘Admin/admin’ as a database password is a surefire way to get hacked almost instantly,’ Moehlenbruck says. ‘A production database with this account smells of poor security policy and a lack of due diligence.’
Seems to agree with that GP was saying.