SQL injection vulnerability in Simple PHP Shopping Cart affecting version 0.9. This vulnerability could allow an attacker to retrieve all the information stored in the database by sending a specially crafted SQL query, due to the lack of proper sanitisation of the category_id parameter in the category.php file.
The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.