Hackers have cracked more than 15 million Ashley Madison account passwords. Hackers discovered programming errors that make the passwords harder to crack. If you have used the same password anywhere else on the internet, you need to change it immediately. Its always important to have strong, hard-to-crack, and crucially unique passwords for every account you create. You should never re-use passwords, just like you shouldnt ever re-used loo paper.”]
Source: https://grahamcluley.com/ashley-madison-users-warned-password-risk/