For iPhone Jailbreakers using SSH to access their devices, but who haven't changed their password from the default, getting Rickrolled by a worm may be annoying, no worse than getting held for ransom by a hacker, but it's a sign that far more insidious and malicious attacks are possible -- so change those passwords now!

Back to the Rickroll. TUAW reports:

A hacker, going by the name "ikee," created a worm that changes the home screen background on jailbroken iPhones whose owners failed to change the default password after installing SSH.

And the new background is, of course, Rick Astley. While removal details are included in an interview with the hacker, it's better to be safe than sorry. So, check our iMuggle's tutorial on how to change your SSH password, and change it right away.