CVE-2010-1155
Irssi before 0.8.15, when SSL is used, does not verify that the server hostname matches a domain name in the subject’s Common Name (CN) field or a Subject Alternative Name field of the X.509 certificate, which allows man-in-the-middle attackers to spoof IRC servers via an arbitrary certificate.
Date published : 2010-04-16
http://github.com/ensc/irssi-proxy/commit/85bbc05b21678e80423815d2ef1dfe26208491ab