All in One SEO Security Update
If you are using the free version of the All in one SEO plugin you need to update to the latest version immediately. Researchers at Sucuri have found multiple security issues with the plugin.
If you're using the premium version, it seems no update has been released yet. No word from the plugin's creator on when, or even if premium members need to update.
Still, be sure you aren't running an older version. It's best, even if no update is showing, to check for updates.
Do this by going to the plugins page in your wordpress dashboard and selecting All in one SEO. Then, go to the dropdown at the top or bottom of the page and pick "update". If there is an update ready, the system will find it.
Unfortunately, for premium users it looks like we're in the dark until we get a response from the support forum.