MegaBBS contains a flaw that allows a remote cross site scripting attack. This flaw exists because the application does not validate "fid" variables upon submission to the "thread-post.asp" script. This could allow a user to create a specially crafted URL that would execute arbitrary code in a user's browser within the trust relationship between the browser and the server, leading to a loss of integrity.
Currently, there are no known workarounds or upgrades to correct this issue. However, PD9 Software has released a patch to address this vulnerability.