Information
From the source code in a .java or a .jpp file, the Java compiler produces a binary file with an extension of .class. The .java or .jpp file would, therefore, reveal sensitive information regarding an application's logic and permissions to resources on the server. By contrast, the .class file, because it is intended to be machine independent, is referred to as bytecode. Bytecodes are run by the Java Virtual Machine (JVM), or the Java Runtime Environment (JRE), via a browser configured to permit Java code.
NOTE: This check only searches the 'C:' drive, if the system has multiple drives ensure each drive doesn't contain compilers.
NOTE: If there is nothing reported in the plugin output then Nessus did not find any backup files on the system.
Solution
Remove all files from the web server with the following extensions: .java and .jpp.