Elasticsearch Alerting and Monitoring in versions before 6.4.1 or 5.6.12 have an information disclosure issue when secrets are configured via the API. The Elasticsearch _cluster/settings API, when queried, could leak sensitive configuration information such as passwords, tokens, or usernames. This could allow an authenticated Elasticsearch user to improperly view these details.
[
{
"product": "Elasticsearch",
"vendor": "Elastic",
"versions": [
{
"status": "affected",
"version": "before 5.6.12 and 6.4.1"
}
]
}
]