The remote host is vulnerable to a SQL injection attack.
The remote host is running SQL-Ledger, a web-based double-entry accounting system. The version of SQL-Ledger on the remote host contains a flaw in the way that it handles user-supplied data to the 'invoice quantity' and 'sort' fields. An attacker exploiting this flaw would be able to inject and run arbitrary SQL commands against the database server.
Upgrade to version 2.6.27 or higher.