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.
[
{
"product": "Elasticsearch",
"vendor": "Elastic",
"versions": [
{
"status": "affected",
"version": "7.0.0, 7.0.1, 7.1.0, 7.1.1, 7.2.0, 7.2.1, 7.3.0, 7.3.1, 7.3.2, 6.7.0, 6.7.1, 6.7.2, 6.8.0, 6.8.1, 6.8.2, 6.8.3"
}
]
}
]