Apache HTTP Server 2.4.16 release fixes the following issue:

) SECURITY: CVE-2015-3185 (cve.mitre.org) Replacement of apsomeauthrequired (unusable in Apache httpd 2.4) with new apsomeauthnrequired and apforceauthn hook. [Ben Reser]

External References:

http://httpd.apache.org/security/vulnerabilities24.html#2.4.16

Multiple cross-site scripting (XSS) vulnerabilities in the makevariantlist function in modnegotiation.c in the modnegotiation module in the Apache HTTP Server 2.4.x before 2.4.3, when the MultiViews option is enabled, allow remote attackers to inject arbitrary web script or HTML via a crafted filename that is not properly handled during construction of a variant list.