Outdated software on website that is a verified PHISH flagged?

See: https://sitecheck.sucuri.net/results/jagnizm.pl
Blacklisted: http://www.phishtank.com/phish_detail.php?phish_id=4035341
A-Status here: https://sritest.io/#report/6480b18f-4c83-4939-ad5d-9c7ee903a1fb
Script to be retired: -http://jagnizm.pl
Detected libraries:
jquery-migrate - 1.2.1 : -http://jagnizm.pl/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.2.1
Info: Severity: medium
http://bugs.jquery.com/ticket/11290
http://research.insecurelabs.org/jquery/test/
jquery - 1.11.3 : (active1) -http://jagnizm.pl/wp-includes/js/jquery/jquery.js?ver=1.11.3
Info: Severity: medium
https://github.com/jquery/jquery/issues/2432
http://blog.jquery.com/2016/01/08/jquery-2-2-and-1-12-released/
(active) - the library was also found to be active by running code
2 vulnerable libraries detected

 
script
     info: [decodingLevel=0] found JavaScript
     error: undefined variable jQuery
     error: undefined function e
     file: e733fb823a27dc0c74946a7790f5fcbbc1a3f2ea: 7199 bytes 

e Parameter missed

$("a.modal").click(function(e){

   e.preventDefault();  
}

info credits go to Stackoverflow’s Erwin

WordPress Version
4.3.4
Version does not appear to be latest 4.5.2 - update now.

polonus