login/change_password.php in Moodle 1.9.x before 1.9.15 does not use https for the change-password form even if the httpslogin option is enabled, which allows remote attackers to obtain credentials by sniffing the network.
https://bugzilla.redhat.com/show_bug.cgi?id=761248
http://www.debian.org/security/2012/dsa-2421
http://moodle.org/mod/forum/discuss.php?d=191752
http://git.moodle.org/gw?p=moodle.git%3Ba=commit%3Bh=01dd64a8c8aa95f793accea371b2392e662663c5