Vulnerability in wpForo Forum — CVE-2026-110004
What to do now
Update wpForo Forum to 3.2.3 or later.
Affected versions
- Everything up to and including 3.2.2
Affected: wpForo Forum (plugin, wpforo)
What the vulnerability is
The wpForo Forum plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the theme_delete function in all versions up to, and including, 3.2.2 This makes it possible for authenticated attackers, with subscriber-level access and above, to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). This exploit chain is reachable only on sites where an administrator has created a custom wpForo secondary usergroup with a blank WordPress role and the 'mth' (Manage Themes) capability; on such sites, an attacker can self-register and claim that group via the unguarded wpforo_secondary_groupids[] POST field, bypassing the role-based group filter and gaining theme-management access as a Subscriber.
Sources
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.2.2/classes/Actions.php#L2405
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.2.2/classes/Actions.php#L2409
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.2.2/classes/Members.php#L1428
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.2.2/includes/functions.php#L1659
- https://plugins.trac.wordpress.org/changeset?reponame=&new=3778162%40wpforo%2Ftags%2F3.2.3&old=3717441%40wpforo%2Ftags%2F3.2.2
- https://wordpress.org/plugins/wpforo/#developers