An Amazon.com security flaw allows some customers to log in with variations of their actual password that are close to, but not exactly, their real password.
The flaw lets Amazon accept as valid some passwords that have extra characters added on after the 8th character, and also makes the password case-insensitive.
For example, if your password is “Password,” Amazon.com will also let you log in with “PASSWORD,” “password,” “passwordpassword,” and “password12345.”
Full story: Amazon.com Security Flaw Accepts Passwords That Are Close, But Not Exact | Threat Level | Wired.com.