CVE-2026-18432: Frontend Admin by DynamiApps <= 3.29.9 - Unauthenticated Privilege Escalation via 'item_id' Parameter

The Frontend Admin by DynamiApps plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 3.29.9. The vulnerability exists because ActionUser::conditionslogic() gates the currentusercan('edituser', $userid) authorization check behind an isnumeric() test, causing the check to be skipped entirely when $userid is a non-numeric string — a condition that can be induced by passing a crafted value such as 1one through the unvalidated itemid parameter of the unauthenticated wpajaxnoprivfrontendadmin/forms/changeform AJAX endpoint. This makes it possible for attackers to escalate privileges to administrator by obtaining a server-signed acfobjects payload carrying the non-numeric user ID, which WordPress subsequently coerces to integer 1 (the default administrator), allowing the attacker to overwrite that account's password or email address. Exploitation by unauthenticated users requires a public-facing frontend user form to be configured; in all other cases a subscriber-level account is sufficient.