MultiVendorX lets subscribers overwrite another store's ownership and payouts
MultiVendorX from 5.0.0 up to but not including 5.0.16: Any authenticated user, including a Subscriber, can act on a selected store through a REST route that does not verify ownership. Attacker-controlled updates can replace store details, payout settings and the recorded owner. The export does not name the route, store selector or writable field names; theft of an actual payout is not independently established.
- Component
- MultiVendorX
- Plugin slug
dc-woocommerce-multi-vendor- Affected
- 5.0.0 to < 5.0.16
- Safe version
5.0.16- Published
- Sep 16, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Sep 16, 2026 and is one of 20 known issues for this plugin.
Update, patch or deactivate.
Update MultiVendorX to 5.0.16 or later. Require store ownership or an appropriate administrative capability on each update, and restrict owner and payout changes to explicitly authorized workflows. Audit ownership and payout-setting changes before further disbursements.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The MultiVendorX WordPress plugin before 5.0.16 does not verify that a user owns the store they are acting on in one of its REST API routes, allowing any authenticated user, such as a subscriber, to overwrite any store's details and payout settings and to replace the record of who owns it.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L