CVE-2011-2197: Rubyonrails Rails

Medium severity, CVSS 4.3. EPSS: 2% chance of exploitation in the next 30 days.

The cross-site scripting (XSS) prevention feature in Ruby on Rails 2.x before 2.3.12, 3.0.x before 3.0.8, and 3.1.x before 3.1.0.rc2 does not properly handle mutation of safe buffers, which makes it easier for remote attackers to conduct XSS attacks via crafted strings to an application that uses a problematic string method, as demonstrated by the sub method.

Affected products

• Rubyonrails Rails: version 2.0.0 only; version 2.0.1 only; version 2.0.2 only; version 2.0.4 only; version 2.1.0 only; version 2.1.1 only; …
• Rubyonrails Ruby On Rails: version 3.0.4 only

Published 2011-06-30. Last modified 2026-06-16.