Joomla! Component Quiz Deluxe 3.7.4 contains an SQL injection vulnerability that allows unauthenticated attackers to execute arbitrary SQL commands through the ajaxaction.flag_question task. Attackers can inject malicious SQL code via the stu_quiz_id or flag_quest parameters to manipulate database queries and extract sensitive information.
https://www.vulncheck.com/advisories/joomla-component-quiz-deluxe-sql-injection
https://www.exploit-db.com/exploits/42589
https://extensions.joomla.org/extensions/extension/living/education-a-culture/quiz-deluxe/