The sanitize helper in
lib/action_controller/vendor/html-scanner/html/sanitizer.rb in the
Action Pack component in Ruby on Rails before 2.3.18, 3.0.x and 3.1.x
before 3.1.12, and 3.2.x before 3.2.13 does not properly handle
encoded : (colon) characters in URLs, which makes it easier for remote
attackers to conduct cross-site scripting (XSS) attacks via a crafted
scheme name, as demonstrated by including a : sequence.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MLIST:[rubyonrails-security] 20130318 [CVE-2013-1857] XSS Vulnerability in the `sanitize` helper of Ruby on Rails
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