I was logged into Plesk under the 'admin' user this morning, went to refresh the page and got taken back to the login screen as my session had expired. So I simply re-entered my details and was told 'Access Denied'. I made several more attempts with no success.

I then tried another account, which worked fine. I tried logging into 'admin' with a made-up password and it told me: 'Log in incorrect' - but when I input the correct password I get the 'Access Denied' alert again! Does anybody know why Plesk has suddenly taken upon itself to deny the 'admin' user access?

Edit: now it would seem all my other accounts have been disabled!

 

Phew, panic over, it seems I was automatically locked out:
http://faq.sw-soft.com/index.php?ToDo=view&questId=287&catId=54

Strange, because I made no previous failed login attempts - unless it isn't ip dependent.