MediaWiki before 1.19.18, 1.20.x through 1.22.x before 1.22.9, and 1.23.x before 1.23.2 does not enforce an IFRAME protection mechanism for transcluded pages, which makes it easier for remote attackers to conduct clickjacking attacks via a crafted web site.
advisories.mageia.org/MGASA-2014-0309.html
openwall.com/lists/oss-security/2014/08/14/5
secunia.com/advisories/59738
www.debian.org/security/2014/dsa-3011
www.mandriva.com/security/advisories?name=MDVSA-2014:153
bugzilla.wikimedia.org/show_bug.cgi?id=65778
lists.wikimedia.org/pipermail/mediawiki-announce/2014-July/000157.html