The release of stolen data from Ashley Madison, a dating website marketed at would-be adulterers, promises to roil the marital lives of its members.

It has also underscored the troubling limitations of Internet privacy.

On Tuesday, hackers appeared to make good on a threat to release what they said was 9.7 gigabytes of account and credit card information from 37 million users of the site.

What information was released?

The data includes members’ names, user names, addresses, phone numbers and birth dates as well as details of credit card transactions. Member passwords are encrypted, but specific users could be easily targeted for decryption, according to Quartz.

Profiles filled out by users could also contain embarrassing information about their sexual preferences.