An unauthenticated attacker can make get_page_template() page-template resolution include a chosen readable local .php file outside the active theme directories. If relevant pre-conditions for both the server and the active theme are met, this can lead to RCE.
{
"cpes": [
"cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*"
],
"severity": "High"
}