Page moderator can change timeline visibility - Facebook Bug03 Apr 2016
It was possible for a page moderator with Facebook Messenger access_token to change timeline visibility of a post by issuing a request to the following graph endpoint after setting proper values.
The GET parameter
timeline_visibility can have any of these values:
According to Page Role specifications, it should not have happened.
Upon successful request, the timeline visibility of the particular post changed into whatever state was passed through the parameter.
Facebook responded saying that it was a duplicate of an issue they were already tracking. Thanks for reading!