This has simply been copied from Supercell forums, it’s important – read on!
Your Supercell Forum password may be at risk – change it immediately
Dear Supercell Forum user,
As we’ve said before, to provide our forum service we use software from vbulletin.com. We’re currently looking into report that a vulnerability allowed third party hackers to gain illegal access to some forum user information, including a number of emails and encrypted passwords. Our preliminary investigation suggests that the breach happened in September 2016 and it has since been fixed.
We take any such breaches very seriously and we follow very strict policies when it comes to security. Please note that this breach only affects our Forum service. Game accounts have not been affected.
To make sure your account is not being accessed without your knowledge, please change the password you are using on this forum as soon as possible. You can reset your password here: https://forum.supercell.com/login.php?do=lostpw
We also strongly advise you to change the password in any other systems you are using with the same login. As a general guideline, matching credentials should not be used on multiple sites.
We apologise for the inconvenience this has caused.
Supercell Community Forums
Nick / Supercell