CVE-2013-1855: Red Hat Enterprise Linux

Medium severity, CVSS 4.3. EPSS: 2.6% chance of exploitation in the next 30 days.

The sanitize_css method 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 \n (newline) characters, which makes it easier for remote attackers to conduct cross-site scripting (XSS) attacks via crafted Cascading Style Sheets (CSS) token sequences.

Affected products

• Red Hat Enterprise Linux: version 6.0 only
• Rubyonrails Rails: version 3.2.0 only; version 3.2.1 only; version 3.2.2 only; version 3.2.3 only; version 3.2.4 only; version 3.2.5 only; …
• Rubyonrails Ruby On Rails: up to and including 2.3.17; version 0.5.0 only; version 0.5.5 only; version 0.5.6 only; version 0.5.7 only; version 0.6.0 only; …

Published 2013-03-19. Last modified 2026-06-16.