Glassdoor and all other businesses that operate on the “holding companies hostage” model are trash, always have been, and people who use them should know better / expect this type of behavior. They are imo even lower than the Facebooks and twitters of the world.
Not surprising.
This crap is the new norm. Companies compile your data, don’t secure it, and the whole world becomes victims of identity theft. Then they get free credit monitoring from the companies that screwed then.
Use a strong password manager with unique complicated passwords.
Freeze your credit.
Assume someone is trying to impersonate you and open credit cards in your name at all times.
Sad state of affairs today.