What is a SQL Injection Vulnerability?

SQL Injection (SQLi) is a critical web application vulnerability that allows attackers to manipulate SQL queries used by a website or application to interact with a database. By injecting malicious SQL code into input fields (e.g., login forms, search bars, or URLs), an attacker can gain unauthorized access to data, modify records, or even delete entire databases.

How SQL Injection Works:

1. An application takes user input (e.g., username, password) and directly inserts it into an SQL query.

2. If the input is not properly sanitized or validated, an attacker can inject malicious SQL commands.

3. This allows them to retrieve sensitive data, alter database records, or execute admin-level commands.

Common Consequences of SQL Injection:

✅ Data breaches – Attackers can steal sensitive user data (e.g., credit card details, passwords).
✅ Account takeovers – Bypassing authentication to access accounts.
✅ Website defacement – Modifying content or deleting entire databases.
✅ System compromise – Gaining admin privileges to control backend systems.

How to Prevent SQL Injection:

✔ Use parameterized queries and prepared statements to prevent malicious input from altering SQL queries.
✔ Implement strict input validation and sanitization to filter out harmful characters.
✔ Regularly update and patch database systems to fix vulnerabilities.
✔ Use Web Application Firewalls (WAFs) to detect and block SQLi attacks in real time.

Why It Matters:

SQL Injection attacks have caused billions in damages, leading to some of the biggest data breaches in history. Organizations must proactively secure their applications to prevent catastrophic financial and reputational damage. 🚀