The bbPress plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.6.11. This is due to missing or incorrect nonce validation on the bbp_user_add_role_on_register() function. This makes it possible for unauthenticated attackers to elevate their privileges to that of a bbPress Keymaster via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. Rather than implementing a nonce check to provide protection against this vulnerability, which would break functionality, the plugin no longer makes it possible to select a role during registration.

AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

CWE-352

https://plugins.trac.wordpress.org/browser/bbpress/trunk/includes/users/signups.php#L151

https://plugins.trac.wordpress.org/changeset/3247345/bbpress/branches/2.6/includes/users/capabilities.php

https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3247345%40bbpress&new=3247345%40bbpress&sfp_email=&sfph_mail=

https://www.wordfence.com/threat-intel/vulnerabilities/id/2d776d94-8c81-4e88-bae3-946824a75c09?source=cve