The School Management System WordPress plugin before 2.2.5 uses the WordPress esc_sql() function on a field not delimited by quotes and did not first prepare the query, leading to a SQL injection exploitable by relatively low-privilege users like Teachers.

The School Management System – WPSchoolPress WordPress plugin before 2.1.10 does not properly sanitize or use prepared statements before using POST variable in SQL queries, leading to SQL injection in multiple actions available to various authenticated users, from simple subscribers/students to teachers and above.

The School Management System – WPSchoolPress WordPress plugin before 2.1.17 sanitise some fields using sanitize_text_field() but does not escape them before outputting in attributes, resulting in Stored Cross-Site Scripting issues.