Auth bypass in Multivendorx

CVE-2026-16605

The MultiVendorX WordPress plugin before 5.0.11 does not verify that the store targeted through its REST API belongs to the requesting vendor, allowing an authenticated vendor (Store Owner and above) to view, take over, permanently delete, or modify any other vendor's store on the marketplace.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (40.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-16605: held from 0.005 to 0.005.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

  • Multivendorx — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-16605?
CVE-2026-16605 is a high-severity vulnerability in Multivendorx, classified under Missing Authorization. CVSS score: 7.2/10. Published 2026-08-05.
How severe is CVE-2026-16605?
High severity. CVSS v3 base score is 7.2 out of 10.