PHP-Fusion 9.03.50 allows SQL Injection because maincore.php has an insufficient protection mechanism. An attacker can develop a crafted payload that can be inserted into the sort_order GET parameter on the members.php members search page. This parameter allows for control over anything after the ORDER BY clause in the SQL query.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 28.6%