Ashley Madison, a website which allows taken individuals to conduct affairs, was hacked last month by a group called The Impact Team.
During the hack, the group got hold of 37 million members and their details, threatening to release them online.
Impact took issue with the site charging for user’s data to be completely deleted - saying that this actually was never carried out, and that peoples' real name and address were still stored on the site.
In a message to Avid Life Media, who run the site along with several other dating websites, Impact wrote:
‘Time’s up! Avid Life Media has failed to take down Ashley Madison and Established Men. We have explained the fraud, deceit, and stupidity of ALM and their members. Now everyone gets to see their data.’
They go onto claim that many of the female profiles on the site are actually fake, and the majority of the site is made up of men looking for an affair - though many probably fail to do so.
‘Chances are your man signed upon the world’s biggest affair site, but never had one. He just tried to. If that distinction matters.’
Information on cheaters has reportedly been published on the Dark Web, which can be found through a covert internet browser called TOR.
ALM have said they will endeavour to take action against the hackers.
‘This event is not an act of hacktivism, it is an act of criminality. It is an illegal action against the individual members of AshleyMadison, as well as any freethinking people who choose to engage in fully lawful online activities,’ said ALM.
‘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. We are continuing to fully co-operate with law enforcement to seek to hold the guilty parties accountable to the strictest measures of the law.’