Skull-Splitter Guestbook Multiple HTML Injection Vulnerabilities

Summary
The remote host is running the Skull-Splitter guestbook, a guestbook written in PHP. The remote version of this software is vulnerable to cross-site scripting attacks. Inserting special characters into the subject or message content can cause arbitrary code execution for third party users, thus resulting in a loss of integrity of their system.
Solution
None at this time