SQL injection is a type of vulnerability that allows an attacker to execute malicious SQL commands on a database by inserting them into an input field. The code snippet resolves this vulnerability by using parameterized queries, which prevent the input from being interpreted as part of the SQL command. Verified Reference: https://www.comptia.org/training/books/casp-cas-004-study-guide , https://owasp.org/www-community/attacks/SQL_Injection