Findings
This plugin contains a large number of unprepared SQL statements. The statements we reviewed appeared safe, however, this is a large and complex codebase and it was not possible to verify that every one of these queries is safe.
There are also instances of input data being passed directly into JSON outputs, however, we suspect this could only be used by an administrator to inject javascript or data into their own session.
This is otherwise a well-written plugin, and this finding is marginal.
Reason for the 'Use with caution' result
The plugin contains or is likely to contain a vulnerability which could be exploited by a privileged user to affect the site’s confidentiality, integrity or availability in a manner exceeding their privileges:
Unprepared SQL statements.