The imapfilter tool, a utility for scripting IMAP operations in lua, lacked server name / certificate peer hostname validation support. For Debian 8 'Jessie', this problem has been fixed in version 1:2.5.2-2+deb8u1. We recommend that you upgrade your imapfilter packages. NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
imapfilter - security update
openSUSE: Security Advisory for imapfilter (openSUSE-SU-2020:0673-1)
Fedora 30 : imapfilter (2019-90925dd5aa)
Fedora 31 : imapfilter (2019-a6c5d70bde)