Stored cross-site scripting (XSS) vulnerability in "geminabox" (Gem in a Box) before 0.13.10 allows attackers to inject arbitrary web script via the "homepage" value of a ".gemspec" file, related to views/gem.erb and views/index.erb.
https://rubygems.org/gems/geminabox/versions/0.13.10
https://github.com/geminabox/geminabox/commit/f8429a9e364658459add170e4ebc7a5d3b4759e7
https://github.com/geminabox/geminabox/blob/master/CHANGELOG.md