Hello,
There are no outstanding security issues with this plugin.
If you have a new security issue to report, please follow WordPress guidelines and report the issue privately to the vendor (2nd paragraph):
https://make.wordpress.org/core/handbook/testing/reporting-security-vulnerabilities/
Also I am the author of this plugin, to reach me anytime visit my contact form.
Thank you for your understanding.
Also RE: “a couple other threads like this”:
There were two reports from almost 3 months ago. One is a false positive, and the other was user error. Again, there are no outstanding security reports with this plugin.
Also please understand that server-side malware can infect *any* file, including plugin files; there doesn’t have to be a vulnerability in the plugin itself. Malware can add bad scripts to any plugin, any file, anywhere on the server.
If you think your site may have been hacked, follow this guide. When you’re done, you may want to implement some (if not all) of WordPress’ recommended security measures, and learn more about site backups.
I hope this helps, let me know if I can provide any further information.