According to Sky News, several websites have been set up in the last two days touting a searchable database, allowing Ashley Madison adulterers to find out if they're at risk of being caught.
However, when a person enters their email address, the websites instantly make them publicly visible, highlighting how a worried cheater has been searching to see whether they are one of the millions that have been affected by the hack that was made in July by a group known as the Impact Team.
Meanwhile, legitimate websites that allow users to search for usernames and email addresses are being forced offline by Ashley Madison's lawyers, who are dishing out copyright infringement notices.
One site forced off the web turned on the site's developers, writing in a post: "To Ashley Madison's development team: You should be embarrassed for your train wreck of a database (and obviously security), not sanitising your phone numbers to your database is completely amateur, it's as if the entire site was made by Comp Sci 1XX students."
Ashley Madison's parent company Avid Life Media responded with a statement saying: "The criminal, or criminals, involved in this act have appointed themselves as the moral judge, juror, and executioner, seeing fit to impose a personal notion of virtue on all of society.
"We will not sit idly by and allow these thieves to force their personal ideology on citizens around the world."
Among the list are over 100 email addresses for UK civil servants, police officers, academics and NHS workers.
Stephen Coty, chief security evangelist at Alert Logic, said: "With such diversity of individuals, whose information was compromised through the Ashley Madison hack, you have to wonder what the lasting impact of this breach can be.
"What are the implications to the companies these individuals work for Will these individuals give in to blackmail to betray their employer, save their marriage or relationship What can this data be used for to compromise our national security or trade secrets These are all questions employers should be asking themselves."