GEN:SID 1:2142
Message WEB-PHP shoutbox.php access
Summary This event is generated when an attempt is made to access the php application shoutbox.
Impact Information gathering possible execution of arbitrary code and remote access to the host.
Detailed Information This event indicates that an attempt has been made to access the php application shoutbox. Shoutbox contains a flaw that can allow an attacker to perform a directory traversal.

The attacker may be trying to gain information on the php implementation on the host, this may be the prelude to an attack against that host using that information.
Affected Systems Any host using php.
Attack Scenarios An attacker can retrieve a sensitive file containing information on the the host. The attacker might then gain administrator access to the host or execute arbitrary code.
Ease of Attack Simple.
Corrective Action Check the php implementation on the host. Ensure all measures have been taken to deny access to sensitive files.

Apply the appropriate vendor supplied patches.

Upgrade to the latest non-affected version of the software.

Check the host for signs of compromise.
Additional References  
Rule References nessus: 11668