Keepass has a lot of plugins. And there is a warning about them:
The plugins offered on this page are developed by different, independent authors. The KeePass team cannot check all plugins for bugs and malicious code before they are distributed here.
How can I know if they safe for using it or not? Have you ever tested them for security, any bugs and malicious?
We don't do much checking apart from trying them out. Like all things in life, it's up to you to be happy about using them.