If you haven't heard of the Heartbleed virus, it's infected the open security code used by many popular web sites.  Here's some passwords you probably should change just to be safe.

There isn't much you can do to protect yourself from the latest Internet threat called "Heartbleed." 

Security experts say until websites take steps to secure their communications, consumers' data will be exposed to hackers.  The "Heartbleed" bug is in widely used web encryption technology known as OpenSSL and it affects software on servers that host websites.  Some of the world's biggest websites could be affected by "Heartbleed" because OpenSSL is used on about two-thirds of all web servers.

To make things even scarier, the bug has gone unnoticed for about two years.  When asked to grade the severity of the bug, one expert said on a scale of one to eleven, it's about an eleven. Yikes.

The tech site Mashable has released a list of sites that if you're on them, it probably wouldn't be a bad idea to change your passwords for. The list includes popular social sites like Facebook and OKCupid, as well as many business sites as well.

Better safe than sorry may be the best strategy.