A member with 'Viewer' role are able to edit the features when the feature service is shared through a web mapping application published using basic viewer template.
Last Published: October 5, 2015ArcGIS Online
Bug ID Number
April 21, 2015
June 11, 2020
Operating System Version
7 64 Bit
This issue was not reproducible when tested by the development team. Issues may be given this status when they cannot be reproduced or are no longer relevant in a development version of the software, but a specific fix was not installed to address the issue. The issue's Additional Information section may contain further explanation.
Non-reproducible. A member with insufficient privileges cannot edit data in an app from the Basic Viewer template.
Use 'Edit' template to publish web mapping application