Modules.cpp in ZNC before 1.7.4-rc1 allows remote authenticated non-admin users to escalate privileges and execute arbitrary code by loading a module with a crafted name.
https://usn.ubuntu.com/4044-1/
https://security.gentoo.org/glsa/201908-15
https://seclists.org/bugtraq/2019/Jun/23
https://lists.debian.org/debian-lts-announce/2019/06/msg00017.html
https://github.com/znc/znc/compare/be1b6bc...d1997d6
https://github.com/znc/znc/commit/8de9e376ce531fe7f3c8b0aa4876d15b479b7311
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00037.html