For the past weeks a spike has been seen in the amount of WordPress websites embedding iframes to exploit kits; more than just Fiesta has been seen. There are thousands of websites currently embedding the iframes, from what little data I have which is only some 3000~ websites it is most likely just a small section of it all.
more here........http://blog.0x3a.com/post/114659871819/thousands-of-compromised-wordpress-websites
more here........http://blog.0x3a.com/post/114659871819/thousands-of-compromised-wordpress-websites