Post creator of a whisper post can be revealed to non-staff users. (PR #13830)

Prior to this fix, post whisperer in personal messages are revealed in the topic’s participants list even though non-staff users are unable to see the whisper.

GitHub

The title of this pull request changed from “SECURITY: Do not reveal post whisperer in personal messages.” to "Post creator of a whisper post can be revealed to non-staff users.