Updated znc packages fix security vulnerabilities:

Multiple vulnerabilities were reported in ZNC version 1.0 which can
be exploited by malicious authenticated users to cause a denial of
service. These flaws are due to errors when handling the editnetwork,
editchan, addchan, and delchan page requests; they can be exploited
to cause a NULL pointer dereference (CVE-2013-2130).

Adding an already existing channel to a user/network via web admin
in ZNC causes a crash if the channel name isn’t prefixed with ‘#’
(CVE-2014-9403).