The Wholesale Market plugin for WordPress is vulnerable to privilege escalation in versions up to, and including, 2.2.2 via the cedwholesalerequestsend AJAX action. The cedwholesalerequestsendcallback() handler only verifies a nonce (which is exposed to any authenticated user through wplocalizescript on the frontend) and that the caller has a positive user ID, then calls WPUser::addrole() with the client-supplied rolerequired POST parameter without restricting the value to an allowlist of wholesale roles. This makes it possible for authenticated attackers, with Subscriber-level access and above, to elevate their privileges to Administrator when the site administrator has enabled the 'Assigning requested role directly' option.