The Quiz Maker WordPress plugin before 6.5.9.9 does not sanitize and escape some of its settings, which could allow high-privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)
The Quiz Maker Business, Developer, and Agency plugins for WordPress is vulnerable to SQL Injection via the ‘id’ parameter in all versions up to, and including, 8.8.0 (Business), up to, and including, 21.8.0 (Developer), and up to, and including, 31.8.0 (Agency) due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. NOTE: The three variations of this software (Business, Developer, and Agency) share the same plugin slug, so you may get an alert even if you are running the latest version of any of the pieces of software. In these cases it is safe to dismiss the notice once you've confirmed your site is on a patched version of the applicable software.
The Quiz Maker plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the ays_show_results() function in all versions up to, and including, 6.5.2.4. This makes it possible for unauthenticated attackers to fetch arbitrary quiz results which can contain PII.
The Quiz Maker plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the ays_quick_start() and add_question_rows() functions in all versions up to, and including, 6.5.2.4. This makes it possible for authenticated attackers, with subscriber-level access and above, to create arbitrary quizzes.
Improper input validation vulnerability in WordPress Quiz Maker Plugin prior to 6.5.0.6 allows a remote authenticated attacker to perform a Denial of Service (DoS) attack against external services.
The Quiz Maker WordPress plugin before 6.4.9.5 does not adequately authorize the `ays_quiz_author_user_search` AJAX action, allowing an unauthenticated attacker to perform a search for users of the system, ultimately leaking user email addresses.
The Quiz Maker WordPress plugin before 6.4.9.5 does not escape generated URLs before outputting them in attributes, leading to Reflected Cross-Site Scripting
The Quiz Maker WordPress plugin before 6.4.2.7 does not escape some parameters before outputting them back in attributes, leading to Reflected Cross-Site Scripting which could be used against high privilege users such as admin
The Quiz Maker WordPress plugin before 6.2.0.9 did not properly sanitise and escape the order and orderby parameters before using them in SQL statements, leading to SQL injection issues in the admin dashboard