The web server running on the remote host is affected by an information disclosure vulnerability.
According to its self-reported version number, the remote host is running a vulnerable version of Apache Tomcat. Affected versions permit a web application to replace the XML parser used to process the XML and TLD files of other applications. This could allow a malicious web app to read or modify 'web.xml', 'context.xml', or TLD files of arbitrary web applications.
Upgrade to versions 7.0.19 / 6.0.20 / 5.5.28 / 4.1.40 or later. Alternatively, apply the patches referenced in the vendor advisory.