CVE-2009-3287 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-3287): lib/thin/connection.rb in Thin web server before 1.2.4 relies on the X-Forwarded-For header to determine the IP address of the client, which allows remote attackers to spoof the IP address and hide activities via a modified X-Forwarded-For header.
Bumped.