Directory traversal vulnerability in the min_get_slash_argument function in lib/configonlylib.php in Moodle through 2.5.9, 2.6.x before 2.6.8, 2.7.x before 2.7.5, and 2.8.x before 2.8.3 allows remote authenticated users to read arbitrary files via a .. (dot dot) in the file parameter, as demonstrated by reading PHP scripts.
https://moodle.org/mod/forum/discuss.php?d=279956
http://openwall.com/lists/oss-security/2015/02/09/2
http://openwall.com/lists/oss-security/2015/02/04/15
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-48980
http://git.moodle.org/gw?p=moodle.git%3Ba=commit%3Bh=af9a7937cc085f96bdbc4724cadec6eeae0242fc