Security risk for opening new tabs or windows


Today eslint reports an error when I introduce eslint-plugin-react

error  Using target="_blank" without rel="noopener noreferrer" is a security risk: see  react/jsx-no-target-blank


Opening a new tab/window, either by hyperlinks (i.e <a> tag with target attribute set to _blank ) or programmatically calling , will grant the newly-opened tab/window access back to the originating tab/window via window.opener . Therefore, the newly opened tab/window can then change the window.opener.location to redirect to the phishing page in the background, or execute some JavaScript on the opener-page on your behalf.

How to fix

Add rel="noopenner" to outgoing links. E.g.

<a href="" target="_blank" rel="noopener">'', 'security', 'noopener');
  • Reset opener property

Note: this technique is subject to Same Origin Policy

let nw ='', 'security');
nw.opener = null;



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