Absolute path traversal vulnerability in steps/mail/sendmail.inc in Roundcube Webmail before 0.7.3 and 0.8.x before 0.8.6 allows remote attackers to read arbitrary files via a full pathname in the _value parameter for the generic_message_footer setting in a save-perf action to index.php, as exploited in the wild in March 2013.
http://www.openwall.com/lists/oss-security/2013/03/28/8
http://sourceforge.net/p/roundcubemail/news/2013/03/security-updates-086-and-073/
http://lists.roundcube.net/pipermail/dev/2013-March/022328.html
http://lists.opensuse.org/opensuse-updates/2013-04/msg00080.html