The remote host is missing an update to rails announced via advisory DSA 2247-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%202247-1

Several vulnerabilities have been discovered in Rails, the Ruby web application framework. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2011-0446 Multiple cross-site scripting (XSS) vulnerabilities when JavaScript encoding is used, allow remote attackers to inject arbitrary web script or HTML. CVE-2011-0447 Rails does not properly validate HTTP requests that contain an X-Requested-With header, which makes it easier for remote attackers to conduct cross-site request forgery (CSRF) attacks. For the oldstable distribution (lenny), this problem has been fixed in version 2.1.0-7+lenny0.1. For the stable distribution (squeeze), this problem has been fixed in version 2.3.5-1.2+squeeze0.1. For the unstable distribution (sid), this problem has been fixed in version 2.3.11-0.1. We recommend that you upgrade your rails packages.