Cross-site scripting (XSS) vulnerability in activesupport/lib/active_support/core_ext/string/output_safety.rb in Ruby on Rails before 3.0.17, 3.1.x before 3.1.8, and 3.2.x before 3.2.8 might allow remote attackers to inject arbitrary web script or HTML via vectors involving a ' (quote) character.
https://groups.google.com/group/rubyonrails-security/msg/8f1bbe1cef8c6caf?dmode=source&output=gplain
http://weblog.rubyonrails.org/2012/8/9/ann-rails-3-2-8-has-been-released/