A security advisory for WP Super Cache has been issued ( http://blog.sucuri.net/2015/04/security-advisory-persistent-xss-in-wp-super-cache.html ). The issue has been address by the developer and a new version has been released. This is a very popular cache plugin, so update as soon as possible if you use the plugin.
It has not been a good month for WordPress. Earlier this month there was a large DoS attack against the WordPress admin page and now there is a remote code execution vulnerability with WP Super Cache and W3 Total Cache.