The WordFence blog has posted a quick article about popular plugins with security holes in them:
Fast Secure Contact Form
Blubrry PowerPress podcasting plugin
Form Manager version
WordPress Files Upload
Crony Cronjob Manager
Not to worry, you can plug these holes by updating the plugins on your website. We recommend you use Website Remote to update all your plugins in one click, whether you're running 5, 10, or 100 WordPress blogs or websites.