Moodle 1.9.x before 1.9.11 and 2.0.x before 2.0.2 places an IMS enterprise enrolment file in the course-files area, which allows remote attackers to obtain sensitive information via a request for imsenterprise-enrol.xml.
http://openwall.com/lists/oss-security/2011/11/14/1
http://moodle.org/mod/forum/discuss.php?d=170009
http://git.moodle.org/gw?p=moodle.git%3Ba=commit%3Bh=6fde0dac702b3d0954bd1c34d427944e9cd89ae6