Mahara before 1.4.1, when MNet (aka the Moodle network feature) is used, allows remote authenticated users to gain privileges via a jump to an XMLRPC target.
mahara.org/interaction/forum/topic.php?id=4138
openwall.com/lists/oss-security/2011/11/04/10
openwall.com/lists/oss-security/2011/11/04/7
secunia.com/advisories/46719
security.debian.org/debian-security/pool/updates/main/m/mahara/mahara_1.2.6-2+squeeze3.debian.tar.gz
www.debian.org/security/2011/dsa-2334
bugs.launchpad.net/mahara/+bug/884223
launchpad.net/mahara/+milestone/1.4.1