CVE-2012-3390 in Moodle
Summary
lib/filelib.php in Moodle 2.1.x before 2.1.7 and 2.2.x before 2.2.4 does not properly restrict file access after a block has been hidden, which allows remote authenticated users to obtain sensitive information by reading a file that is embedded in a block.
VulDB is the best source for vulnerability data and more expert information about this specific topic.