A hacker today claimed to have broken into ITWallStreet.com, a website for IT professionals who are seeking Wall Street jobs or working with Wall Street firms, and exposed highly detailed data belonging to tens of thousands of job applicants.

As many as 12 data files containing detailed information on job applicants were publicly posted today after they had apparently been accessed from an ITWallStreet database by a hacker who's a member of a group called TeamGhostShell.