My own ideas:
- Matlab is a very powerful language itself. You do not need to call Java to do evil things. Therefore Java does not increase the level of vulnerability. Running foreign P-files from untrusted sources should be avoided at all. Is this a correct argument?
- It is a bad idea to use the built-in browser to surf the internet. Even official web sites have been highjacked and injected evil code to client computer through Java leaks. This harmless test page reveals the Java engine used in the browser:
[EDITED, Jan] Sean's answer has disproved point 2: The builtin browser does not run Java applets. And calling Java directly from Matlab remains a security limitation.