Now available in Software Update (as of 5-21-04), Apple released a security update to address the recently exposed security hole that takes advantage of a theoretical vulnerability in the Help Viewer application that could have been exposed when browsing the web.
Security Update 2004-05-24 delivers a number of security enhancements and is recommended for all Macintosh users. This update includes the following components:
HelpViewer
The reason for the mismatch of dates is not known.