SQL injection attacks and Python exploitation

SQL injection is a vulnerability that occurs when user input is incorrectly filtered for SQL commands, allowing an attacker to execute arbitrary SQL queries. Let’s consider a simple example (with a fictional scenario) to illustrate how SQL injection can occur.

Let’s say there’s a login form on a website that takes a username and password to authenticate users. The backend code might look something like this:

  import sqlite3
  # Simulating a login function vulnerable to SQL injection
  def login(username, password):
      conn = sqlite3.connect('users.db')
      cursor = conn.cursor()
      # Vulnerable query
      query = f"SELECT * FROM users WHERE username = '{username}' AND password = '{password}'"
    ...