The HTMLQuoteColorer::process function in messageviewer/htmlquotecolorer.cpp in KDE PIM 4.6 through 4.8 does not disable JavaScript, Java, and Plugins, which allows remote attackers to inject arbitrary web script or HTML via a crafted email.
http://www.openwall.com/lists/oss-security/2012/07/17/11
http://www.openwall.com/lists/oss-security/2012/07/16/3
http://www.openwall.com/lists/oss-security/2012/07/13/4
http://www.openwall.com/lists/oss-security/2012/07/13/3
http://ubuntu.com/usn/usn-1512-1
http://secunia.com/advisories/50008
http://lists.fedoraproject.org/pipermail/package-announce/2012-July/084262.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-July/083946.html