If you wish to preserve the dates, open a mongo terminal,and execute the following command.
(change cvedb
to the appropriate database)
use cvedb
db.cves.find().forEach(function(doc){
if(doc["Published"]){ doc["Published"] = ISODate(doc["Published"]) }
if(doc["Modified"]){ doc["Modified"] = ISODate(doc["Modified"]) }
if(doc["last-modified"]){ doc["last-modified"] = ISODate(doc["last-modified"]) }
if(doc["cvss-time"]){ doc["cvss-time"] = ISODate(doc["cvss-time"]) }
db.cves.update({id: doc["id"]}, doc)
});
db.info.drop()