Multiple cross-site request forgery (CSRF) vulnerabilities in the Forum module in Moodle through 2.4.11, 2.5.x before 2.5.9, 2.6.x before 2.6.6, and 2.7.x before 2.7.3 allow remote attackers to hijack the authentication of arbitrary users for requests that set a tracking preference within (1) mod/forum/deprecatedlib.php, (2) mod/forum/forum.js, (3) mod/forum/index.php, or (4) mod/forum/lib.php.
git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-48019
openwall.com/lists/oss-security/2014/11/17/11
github.com/moodle/moodle
github.com/moodle/moodle/commit/545eb1bcfdbfc352bf6c31edf440485ba6d5af42
github.com/moodle/moodle/commit/7a311adbba9471edb5a49e4c4b8c356c87f0e44b
github.com/moodle/moodle/commit/bef4a5e01739f2b239c0910b9e1aa2841b979f7d
github.com/moodle/moodle/commit/c812956efda7d10dfdce5ae19c0ec8879de38a31
moodle.org/mod/forum/discuss.php?d=275164
nvd.nist.gov/vuln/detail/CVE-2014-7838
web.archive.org/web/20150914064838/www.securitytracker.com/id/1031215