Ruby on Rails Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) Vulnerability - CVE-2015-3226
Cross-site scripting (XSS) vulnerability in json/encoding.rb in Active Support in Ruby on Rails 3.x and 4.1.x before 4.1.11 and 4.2.x before 4.2.2 allows remote attackers to inject arbitrary web script or HTML via a crafted Hash that is mishandled during JSON encoding.