Sphider query Parameter Cross-Site Scripting Vulnerability

This host is running Sphider and is prone to cross-site scripting vulnerability.
Successful attack could lead to execution of arbitrary HTML or scripting code in the security context of an affected web page, which allows an attacker to steal cookie-based authentication credentials or access and modify data.
No solution or patch was made available for at least one year since disclosure of this vulnerability. Likely none will be provided anymore. General solution options are to upgrade to a newer release, disable respective features, remove the product or replace the product by another one. For updates refer to http://www.sphider.eu/
The flaw is due to input passed into the query parameter in search.php when suggestion feature is enabled is not properly sanitized before being returned to a user.
Sphider Version 1.3.4 and prior on all running platform.