Moodle 2.1.x before 2.1.6 and 2.2.x before 2.2.3 allows remote authenticated users to obtain sensitive user information from hidden fields by leveraging the teacher role and navigating to “Enrolled users” under the Users Settings section.
git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-31923
openwall.com/lists/oss-security/2012/05/23/2
github.com/moodle/moodle
github.com/moodle/moodle/commit/a645b79113b2ee7881b6bdae64a0c2a9f04db5c7
github.com/moodle/moodle/commit/ce13ea6ceb15f00c3cc6d40d79b06be39de7987a
github.com/moodle/moodle/commit/cfaa50a61d61719c65aa7e26f5444852931e07b6
nvd.nist.gov/vuln/detail/CVE-2012-2353