Kaspersky Lab, a leading developer of secure content management systems, has detected a new worm, Net-Worm.Perl.Santy.a. This worm infects certain web sites by exploiting a vulnerability in phpBB, a popular package used to create Internet forums. Santy.a is spreading rapidly, and has caused an epidemic. However, this does not directly affect end users - although the worm infects web sites, it does not infect computers used to view these sites.