phpBazar 'classified.php' SQL Injection Vulnerability

Summary
The host is running phpBazar and is prone to SQL Injection vulnerability.
Impact
Successful exploitation could allow execution of arbitrary SQL commands in the affected application. Impact Level: Application
Solution
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.
Insight
The flaw is due to error in 'classified.php' which can be exploited to cause SQL injection via the 'catid' parameter, and 'admin/admin.php' which allows to obtain access to the admin control panel via a direct request.
Affected
phpBazar version 2.1.1 and prior.
References