# WCFM Membership – WooCommerce Memberships for Multivendor Marketplace <= 2.12.0 - Authenticated (Subscriber+) Membership Payment Bypass via WooCommerce Checkout Order

- **ID:** WPSEC-2026-2277
- **Plugin:** WCFM Membership – WooCommerce Memberships for Multivendor Marketplace (`wc-multivendor-membership`), https://wordpress.org/plugins/wc-multivendor-membership/
- **Affected versions:** all versions before 2.12.1
- **Fixed in:** 2.12.1 (Update to 2.12.1 or later.)
- **Severity:** Medium 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N)
- **Weakness:** CWE-639
- **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-membership
- **Fix released:** 2026-11-02
- **Published:** 2026-11-03
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2277/

## Description

The WCFM Membership – WooCommerce Memberships for Multivendor Marketplace plugin for WordPress is vulnerable to payment bypass via WooCommerce checkout membership orders in all versions up to, and including, 2.12.0, due to the plugin picking the plan to activate on order completion from the buyer's own temp_wcfm_membership user meta instead of the membership product that was purchased. This makes it possible for authenticated attackers with subscriber-level access, such as a membership applicant, to pay for an inexpensive membership product and have a different, more expensive plan activated.

## References

- https://wpsec.com/vuln/WPSEC-2026-2277/
- https://plugins.svn.wordpress.org/wc-multivendor-membership/tags/2.12.1/
- https://wordpress.org/plugins/wc-multivendor-membership/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2277/

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.