Authentication bypass is a security vulnerability that allows attackers to gain unauthorized access to a system by circumventing the authentication process without providing valid credentials.

The most common types of impact when attackers use authentication bypass to compromise user access control and steal data:

• Data theft from unauthorized parties
• Risk of data loss when attackers steal or destroy information stored on a device or server
• Data corruption that allows unauthorized users to change information stored in the system

SQL injection attack has resulted in a bypass of the login page.

• Do not create SQL queries with string concatenation. Instead use prepared statements or stored procedures.

• SQL Injection
• SQL Injection Prevention Cheat Sheet
• Improper Neutralization of Special Elements used in an SQL Command