The internet is dealing with the fallout of a major security flaw, known as Heartbleed, affecting almost everyone with an online account of some type. If you have a Yahoo, Google, Tumblr, Facebook, or any number of other accounts you are advised to change your password. Many companies have already added security patches to their systems, but your login information is still vulnerable. For more information, including a list of websites that have been affected, Mashable has a quick guide, and LastPass has a more in-depth source to check if a website you use has been affected. Check the LastPass site before you change your password, as if it has not updated their security it is not safe to change your password yet.