Cross-site request forgery (CSRF) vulnerability in report/overview/report.php in the quiz module in Moodle before 1.8.13 and 1.9.x before 1.9.9 allows remote attackers to hijack the authentication of arbitrary users for requests that delete quiz attempts via the attemptid parameter.
https://bugzilla.redhat.com/show_bug.cgi?id=605809
http://www.vupen.com/english/advisories/2010/1571
http://www.vupen.com/english/advisories/2010/1530
http://www.openwall.com/lists/oss-security/2010/06/21/2
http://tracker.moodle.org/browse/MDL-21688
http://secunia.com/advisories/40352
http://secunia.com/advisories/40248
http://moodle.org/mod/forum/discuss.php?d=152369
http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-June/043340.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-June/043291.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-June/043285.html
http://docs.moodle.org/en/Moodle_1.9.9_release_notes
http://docs.moodle.org/en/Moodle_1.8.13_release_notes
http://cvs.moodle.org/moodle/mod/quiz/report/overview/report.php?r1=1.98.2.50&r2=1.98.2.51