On Special:AbuseFilter, I can do a Search within rules and put something like user_unnamed_ip. This will then show the filter's rules in the table, even to users who don't have permission to see the filter.
For example: Special:AbuseFilter/?querypattern=user_unnamed_ip&searchoption=LIKE
Search is restricted to users who have private filter viewing rights. Trying to do a similar update with protected variable viewing rights would lock everyone out of this feature, as no one has the right yet. Instead, update the query to only return filters that the user has the right to see.