WordPress.org has released a Security Update.
Here’s why.
WordPress 4.5.2 is now available. This is a security release for all previous versions and we strongly encourage you to update your sites immediately.
WordPress versions 4.5.1 and earlier are affected by a SOME vulnerability through Plupload, the third-party library WordPress uses for uploading files. WordPress versions 4.2 through 4.5.1 are vulnerable to reflected XSS using specially crafted URIs through MediaElement.js, the third-party library used for media players. MediaElement.js and Plupload have also released updates fixing these issues.
You can relax if you have any of the Unlimited WordPress Support packages. If you don’t Practice safe blogging 🙂 keep your WordPress software, plugins and themes up to date.