This plugin is fundamentally well-written, but contains a very large number of unprepared SQL statements. In all other respects it scored well. This recommendation is therefore marginal.
Reason for the 'Use with caution' result
The plugin has been given this recommendation at the tester's discretion:
Within the limits of an inspection, it was not possible to demonstrate that none of the unprepared SQL statements in this plugin is vulnerable and the large number of potentially vulnerable statements is an issue of concern.
Ideally, this plugin should be reviewed so that its SQL statements can be more thoroughly examined.