The version of BigTree-CMS running on the remote server is affected by a XSS vulnerability.
The version of BigTree-CMS installed on the remote host is 4.2.x prior to 4.2.3 and is affected by a vulnerability that allows a stored XSS attack. This flaw exists because the user creation process does not validate input supplied as username and company name before returning it to users. This may allow a remote, authenticated attacker to create a specially crafted request that would execute arbitrary script code in a user's browser session within the trust relationship between their browser and the server.
Upgrade to BigTree-CMS version 4.2.3 or later.