WordPress before 5.8 lacks support for the Update URI plugin header. This makes it easier for remote attackers to execute arbitrary code via a supply-chain attack against WordPress installations that use any plugin for which the slug satisfies the naming constraints of the WordPress.org Plugin Directory but is not yet present in that directory.
{
"cpes": [
"cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*"
],
"severity": "Critical"
}