IMAPFilter through 2.6.12 does not validate the hostname in an SSL certificate.
Created imapfilter tracking bugs for this issue:
Affects: epel-all [bug 1765136]
Affects: fedora-all [bug 1765135]
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.