source: https://www.securityfocus.com/bid/8692/info

It has been reported that yMonda Thread-IT is prone to a HTML injection vulnerability that may allow an attacker to execute HTML code in a user's browser. The issue is reported to be present in the 'Topic Title', 'Name', and 'Message' fields. This problem is due to insufficient sanitization of user-supplied input.

Successful exploitation of this vulnerability may allow an attacker to steal cookie-based authentication credentials. Other attacks are also possible.

Thread-IT version 1.6 and prior may be vulnerable to this issue. 

"><script> this code will hide every thing after it including the the board topics if any attacker write it in the topic title.

<script>windows.open("URL");</script> this code will open a new window when the board loaded.