The do_set_password function in modules/chanserv/set.c in IRC Services before 5.0.60 preserves channel founder privileges across a channel password change (ChanServ SET PASSWORD), which allows remote authenticated users to obtain the new password through automated e-mail, or perform privileged actions without knowing the new password.
https://exchange.xforce.ibmcloud.com/vulnerabilities/34945
http://www.ircservices.za.net/Changes.txt
http://lists.ircservices.za.net/pipermail/ircservices/2007/005229.html
http://lists.ircservices.za.net/pipermail/ircservices/2007/005228.html