Eval code in wordpress??

So i tried exploit scanner plug in today for the first time, and i was shocked as found so many eval started code, is this serious??

Please help, how to remove this without effecting the theme and how to undone the damage(If any damage done)!

explode(':', base64_decode(substr($_SERVER['HTTP_AUTHORIZATION'], 6)));

Used by malicious scripts to decode previously obscured data/programs explode(':', base64_decode(substr($_SERVER['REDIRECT_REMOTE_USER'], 6)));

Used by malicious scripts to decode previously obscured data/programs $imgData = base64_decode("R0lGODlhUAAMAIAAAP8AAP///yH5BAAHAP8ALAAAAABQAA

Often used to execute malicious code * Javascript, and can be directly eval()'ed with no further parsing

Often used to execute malicious code j = eval('(' + text + ')');

Often used to execute malicious code <div class="phptextwidget"><?php eval('?>'.$text); ?></div>

Often used to execute malicious code cuteOnLoad:function(s){this.onInit.add(function(){eval(s)})},storeSelection:function(){this.editor.w in

It's impossible to say for sure without looking at more context for each line, but initially I would say that none of those look like exploits.