Hackers Gain Access to WP Sites
Excerpt: Of the 1,032 survey respondents who answered this question, 61.5% didn’t know how the Attacker compromised their website. That is a not a huge surprise given that the large majority of respondents cleaned their sites themselves, but it is troubling. It is impossible to be confident that you have cleaned your site completely or that the vulnerability doesn’t still exist without knowing how the site was compromised in the first place.
For the site owners who did figure out how the attackers entered, see chart above.
Source: The rest of the article can be found here – How Hackers Gain Access to WordPress Sites