The remote host is vulnerable to a Script Injection attack.
The remote host is running a version of UBB.threads that fails to correctly parse multiple PHP scripts. A remote attacker can send malformed HTTP requests that, when processed, forces the UBB.threads server to execute arbitrary database commands or inject malicious code into user browsers. As a result, a remote attacker can pass malicious input to database queries, potentially resulting in data exposure, modification of the query logic, or even data modification or attacks against the database itself.
Upgrade to version 6.5.2 Beta 2 or higher.