Adding .ico and .exe extensions to the "Allowed File Extensions" in Settings->Upload seems to be to no avail.
The users who needs to upload has received "Upload Files" and "Upload Images" in Manage->Privileges and these privileges are "Global".
We also activated "Allow users to upload regular files" in Settings->Upload.
Uploading other files such as .png works without issues.
Uploading .ico results in "ERROR Input file is missing or of an unsupported image format"
Uploading .exe results in "ERROR You do not have enough privileges for this action"
Uploading .ico used to work, until two NodeBB upgrades ago, or so.
Perhaps I should mention that we store all uploaded files locally.
NodeBB is at v1.11.1 on Ubuntu 16.04.
Do I miss something glaringly obvious since, no one else appear to have this issue?