SafeTargetBlank

SafeTargetBlank will secure your rails Application use of link_to helper.

If you use the target="_blank" attribute on a link, you are leaving your users open to a very simple phishing attack. Adding rel="noopener noreferrer" on those links will prevent this vulnerability.

Read more about this issue here:

• https://www.jitbit.com/alexblog/256-targetblank---the-most-underestimated-vulnerability-ever/
• https://dev.to/ben/the-targetblank-vulnerability-by-example

Installation

Add this line to your application's Gemfile:

gem 'safe_target_blank'

Now each time you use the link_to helper with target="_blank", rel="noopener noreferrer" will be added.

link_to 'Safe', 'safe.io', target: :_blank
#=> '<a target="_blank" rel="noopener noreferrer" href="safe.io">Safe</a>'

You can opt out with opener and referrer options.

link_to 'Safe', 'safe.io', target: :_blank, referrer: true
#=> '<a target="_blank" rel="noopener" href="safe.io">Safe</a>'

Or disable it globally.

SafeTargetBlank.opener = true
link_to 'Safe', 'safe.io', target: :_blank
#=> '<a target="_blank" rel="noreferrer" href="safe.io">Safe</a>'

Contributing

After checking out the repo, run bin/setup to install dependencies. Then, run rake to run the tests.

You can also run bin/console for an interactive prompt that will allow you to experiment.

Bug reports and pull requests are welcome on GitHub.

License

The gem is available as open source under the terms of the MIT License.