The remote host is missing an update to the system as announced in the referenced advisory.
The following packages are affected: tomcat55 tomcat6 tomcat7
CVE-2011-0013 Multiple cross-site scripting (XSS) vulnerabilities in the HTML Manager Interface in Apache Software Foundation Tomcat 7.0 before 7.0.6, 5.5 before 5.5.32, and 6.0 before 6.0.30 allow remote attackers to inject arbitrary web script or HTML, as demonstrated via the display-name tag.
Solution: Update your system with the appropriate patches or software upgrades.