# WCFM Marketplace <= 3.8.3 - Unauthenticated Missing Authorization to Setup Wizard Access and Plugin Installation

- **ID:** WPSEC-2026-2372
- **Plugin:** WCFM Marketplace – Multivendor Marketplace for WooCommerce (`wc-multivendor-marketplace`), https://wordpress.org/plugins/wc-multivendor-marketplace/
- **Affected versions:** all versions before 3.8.4
- **Fixed in:** 3.8.4 (Update to 3.8.4 or later.)
- **Severity:** Medium 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
- **Weakness:** CWE-862
- **Usage among sites WPSec scans:** plugin Low, affected versions None seen (as of 2026-11-03)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/wc-multivendor-marketplace
- **Fix released:** 2026-11-02
- **Published:** 2026-11-03
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2372/

## Description

The WCFM Marketplace plugin for WordPress is vulnerable to unauthorized access to its setup wizard in all versions up to, and including, 3.8.3, due to a missing capability check. The wizard runs on admin_init whenever the 'page' parameter is 'wcfmmp-setup', and its plugin install handlers are protected only by nonces that the wizard prints to every visitor. This makes it possible for unauthenticated attackers to open the marketplace setup wizard through wp-admin/admin-ajax.php and use its install handlers to download, install and activate the WooCommerce, WCFM (WC Frontend Manager) and WCFM Membership plugins from WordPress.org when they are not already active.

## References

- https://wpsec.com/vuln/WPSEC-2026-2372/
- https://plugins.svn.wordpress.org/wc-multivendor-marketplace/tags/3.8.4/
- https://wordpress.org/plugins/wc-multivendor-marketplace/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2372/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.