CVE-2013-1855 rubygem-actionpack: css_sanitization: XSS vulnerability in sanitize_css

The sanitizecss method in lib/actioncontroller/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 \n newline characters, which makes it easier for remote attackers to...