The remote host is missing an update to moodle announced via advisory USN-658-1.
A security issue affects the following Ubuntu releases:
Ubuntu 7.10 Ubuntu 8.04 LTS
This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu.
Details follow:
Lukasz Pilorz discovered that the HTML filtering used in Moodle was not strict enough. A remote attacker could send malicious requests to Moodle and execute arbitrary code as the web server user.
Solution: The problem can be corrected by upgrading your system to the following package versions:
Ubuntu 7.10: moodle 1.8.2-1ubuntu2.1
Ubuntu 8.04 LTS: moodle 1.8.2-1ubuntu4.1
In general, a standard system upgrade is sufficient to effect the necessary changes.