WordPress is affected by an unauthenticated blind SSRF in the pingback feature. Because of a TOCTOU race condition between the validation checks and the HTTP request, attackers can reach internal hosts that are explicitly forbidden.
{
"cpes": [
"cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
"cpe:2.3:a:wordpress:wordpress:4.1:-:*:*:*:*:*:*"
],
"severity": "Medium"
}