This is not a vulnerability. The developer is aware of this as identified by the poster ,
when the locations in your dataset is marked private you can still find the url.
We do not see this as sensitive or a vulnerability considering the type of use the plug-in is intended for. Just delete any locations you don’t want to be shown instead of marking them as private.
Please list any other issues you have found or specific info reported if it turns out that’s not the “sensitive data” they are referring to.
The plug-in is not intend for sensitive data use. It is intended for the ability to find locations for your customers queries.