2819371938193817109948281937271937 and have to click OK to see the page. I get this with every refresh or clicking on some post. I did nothing since the last time when website was working fine. Screenshot:
The source code:
<script>alert("2819371938193817109948281937271937");</script> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
The header.php doesn't have this script and nothing is loading before header.php.
What is happening? How can I trace where is the script?
EDIT: I found the script in
wordpress/index.php, but don't know what put it there. I suspect XML Sitemap plugin.