moodle/moodle is vulnerable to Sequential Quiz Bypass. The vulnerability exists because some quizzes services don’t ensure sequential quiz questions in the API, which allows an attacker to bypass consecutive navigation during a quiz attempt.
github.com/advisories/GHSA-948f-j464-rfj2
github.com/moodle/moodle/commit/00e3145a6129737b0de2fd8e1a80a634156a6fad
github.com/moodle/moodle/commit/025e0297b65e6a8bd61efad0fdf36168c613f918
github.com/moodle/moodle/commit/284b201a28c89caf68b03430b1815efb7a527bad
github.com/moodle/moodle/commit/4cb39164fa3b28e64422464ba86fda001444c5e3
moodle.org/mod/forum/discuss.php?d=438761