The WPQuiz plugin for WordPress is vulnerable to SQL Injection via the 'id' attribute of the 'wpquiz' shortcode in all versions up to, and including, 0.4.2 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with Contributor-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Multiple SQL injection vulnerabilities in wpQuiz 2.7 allow remote attackers to execute arbitrary SQL commands via the (1) id and (2) password (pw) parameters to (a) admin.php or (b) user.php.

Multiple SQL injection vulnerabilities in wpQuiz 2.7 allow remote attackers to execute arbitrary SQL commands via the id parameter to (1) viewimage.php and (2) comments.php.

WpQuiz 2.60b1 through 2.60b8 allows remote attackers to gain privileges via a direct request to adminrestore.php in the extras directory.