I found that my website was hacked!
and follows with a lot of invisible spammy links wrapped with <p class="nemonn">. (can be seen only through view source)
The thing is - I found it on wordpress.org as well!!
I just removed it through the code editor so it doesn't appear anymore. If you google the line above you will find it on more websites built on wordpress, for example.
I have no idea when this code was injected. I have the latest version of wordpress, yet I have waited a bit before upgrading to it (couple of weeks)
Does anybody know what it is and how it got to the system?
Thanks in advance!
UPDATE: it seems not to be the first time. It was also reported on August 2012 for Joomla: