ApostropheCMS import-export: NoSQL injection via update-key value lets a crafted import match and overwrite an unidentified document

Summary @apostrophecms/import-export's update-by-key feature lets an imported document carry a :key property for example slug:key whose value is used to find an existing document to update instead of inserting a new one. getUpdateKey/insertOrUpdateDocWithKey lib/methods/import.js use that value...