Moodle multiple cross-site request forgery (CSRF) vulnerabilities

Multiple cross-site request forgery CSRF vulnerabilities in the lesson module in Moodle through 2.6.11, 2.7.x before 2.7.11, 2.8.x before 2.8.9, and 2.9.x before 2.9.3 allow remote attackers to hijack the authentication of arbitrary users for requests to 1 mod/lesson/mediafile.php or 2...