Rails LTS 2.3 is a maintained release of Rails 2.3 that includes additional security fixes. See https://railslts.com/ for more information.
Since this LTS release focuses on security only, we would ask you to not submit pull requests with non-essential changes.
If you have found a vulnerability that relates to Rails in general, please check http://rubyonrails.org/security. If you found something related to LTS only, you can contact us at railslts-maintainers@makandra.de.