DeluxeBB 'newpost.php' SQL Injection Vulnerability

Summary
The host is running DeluxeBB and is prone to SQL injection vulnerability.
Impact
Successful exploitation could allow remote attackers to execute arbitrary SQL commands via the membercookie cookie when adding a new thread. 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 'newpost.php', which is not properly sanitizing user supplied input data.
Affected
DeluxeBB version 1.3 and prior.
References