Elasticsearch versions 7.0.0-7.3.2 and 6.7.0-6.8.3 contain a username disclosure flaw was found in the API Key service. An unauthenticated attacker could send a specially crafted request and determine if a username exists in the Elasticsearch native realm.
{
"nvd_published_at": "2019-10-30T14:15:00Z",
"severity": "MODERATE",
"cwe_ids": [
"CWE-200"
],
"github_reviewed": true,
"github_reviewed_at": "2022-06-27T14:23:09Z"
}