internal/advanced_comment_system/admin.php in Advanced Comment System 1.0 is prone to an SQL injection vulnerability because it fails to sufficiently sanitize user-supplied data before using it in an SQL query, allowing remote attackers to execute the sqli attack via a URL in the "page" parameter. NOTE: The product is discontinued.
https://www.exploit-db.com/exploits/45853/
http://seclists.org/fulldisclosure/2018/Nov/30
http://packetstormsecurity.com/files/150261/Advanced-Comment-System-1.0-SQL-Injection.html