From: Apple Product Security
Reply to list

APPLE-SA-2015-09-16-4 OS X Server 5.0.3

OS X Server 5.0.3 is now available and addresses the following:

apache
Available for:  OS X Yosemite v10.10.4 or later
Impact:  Multiple vulnerabilities in Apache, the most serious of
which may allow a remote attacker to cause a denial of service [...]