Apache v2.0.43 - Apache is the most popular webserver on the Internet, and ranks well in terms of security, functionality, efficiency, and speed. Changelog available here.
Changes: Fixes a cross-site scripting vulnerability in the default error page of Apache 2.0 before 2.0.43 when UseCanonicalName is "Off" and support for wildcard DNS is present which allows remote attackers to execute html and java script as other web page visitors via the Host: header.