A flaw was discovered in Elasticsearch 7.17.0’s upgrade assistant, in which upgrading from version 6.x to 7.x would disable the in-built protections on the security index, allowing authenticated users with “*” index permissions access to this index.
{
"cpes": [
"cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*"
],
"severity": "Medium"
}