# WCFM Marketplace <= 3.8.3 - Authenticated (Store Vendor+) Stored Cross-Site Scripting via Store Video Banner

- **ID:** WPSEC-2026-2374
- **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 6.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **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-2026-2374/

## Description

The WCFM Marketplace plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the store video banner in all versions up to, and including, 3.8.3 due to the banner embed replacing only the YouTube URL inside the value and printing the rest of it without escaping. This makes it possible for authenticated attackers with vendor-level access to inject arbitrary web scripts that execute whenever a user visits the store page or the store list.

## References

- https://wpsec.com/vuln/WPSEC-2026-2374/
- 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-2026-2374/

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.