An authenticated user with API access (e.g.: user with default User role), more specifically a user with access to the user.update API endpoint is enough to be able to add themselves to any group (e.g.: Zabbix Administrators), except to groups that are disabled or having restricted GUI access.
{
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*"
],
"source": "CPE_RANGE",
"extracted_events": [
{
"introduced": "5.0.0"
},
{
"fixed": "5.0.43"
},
{
"introduced": "6.4.0"
},
{
"fixed": "6.4.18"
}
],
"vendor_product": "zabbix:zabbix"
}
]
}