UBB.threads 6.2.3 has been released to the Member Area.UBB.threads™ 6.2.3 fixes a potential security flaw that was spotted by one of our users.
There are only 2 files changed from version 6.2.2
ubbt.inc.php
admin/editconfig.php
Upload these 2 files, log into your admin area, click the "Edit config settings" link, click the update button and that's it, you're done .

Official announcement
here.