Feedback on my Tribute Page - Jacob P

Feedback on my Tribute Page - Jacob P
0

#1

Hello! My name is Jacob and I am asking for any feedback on my tribute page. Any help is great. Thanks!


#2

Hi @JacobPie1,

  • Target blank vulnerability
<a href="http://www.history.com/topics/american-civil-war/abner-doubleday" target="_blank">here.</a>

MDN documentation:

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/a

Note: When using target, consider adding rel="noopener noreferrer"
to avoid exploitation of the window.opener API.

https://mathiasbynens.github.io/rel-noopener/

TL;DR If window.opener is set, a page can trigger a navigation in the opener regardless of security origin.

https://www.jitbit.com/alexblog/256-targetblank---the-most-underestimated-vulnerability-ever/

People using target=’_blank’ links usually have no idea about this curious fact:
The page we’re linking to gains partial access to the linking page via the window.opener object.
The newly opened tab can, say, change the window.opener.location to some phishing page. Or execute some JavaScript on the opener-page on your behalf… Users trust the page that is already opened, they won’t get suspicious.

How to fix
Add this to your outgoing links.

rel="noopener"

Update: FF does not support “noopener” so add this.

rel="noopener noreferrer"

Remember, that every time you open a new window via window.open(); you’re also “vulnerable” to this, so always reset the “opener” property

var newWnd = window.open();
newWnd.opener = null;

Cheers and happy coding :slight_smile: