In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK.
[
{
"cpes": [
"cpe:2.3:a:znc:znc:*:*:*:*:*:*:*:*"
],
"vendor": "znc",
"product": "znc",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "1.9.1",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
}
]