The Quiz Maker Business, Developer, and Agency plugins for WordPress is vulnerable to arbitrary shortcode execution 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). This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes.
The Quiz Maker Business, Developer, and Agency plugins for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'ays_save_google_credentials' function 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). This makes it possible for unauthenticated attackers to modify the Google Sheets integration credentials within the plugin's settings. Because the 'client_id' parameter is not sanitized or escaped when used in output, this vulnerability could also be leveraged to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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 Business, Developer, and Agency plugins for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘content’ 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 input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
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.