Author: haleyjd
Description:
The IANA standard image/vnd.microsoft.icon MIME type is not configured to correspond to the .ico file extension in includes/mime.types, which instead associates it with the Microsoft-preferred but non-standard image/x-icon.
This causes attempts to overwrite already existing icons on our wiki, which were previously allowed to uploaded by MediaWiki 1.16.2, to fail with the error message "File extension '.ico' does not match the detected MIME type 'image/vnd.microsoft.icon'.
A quick Google search shows many other users are affected, including the ShoutWiki farm.
Version: 1.23.2
Severity: normal