Auth bypass in Sumit Payment Gateway For Woocommerce

CVE-2026-84091

The SUMIT Payment Gateway for WooCommerce WordPress plugin before 4.0.0 does not verify with the payment provider that a payment notification is genuine before marking the corresponding order as paid, allowing unauthenticated users to mark a pending order paid without completing payment.

Vulnerability class: Broken Authentication

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (23.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.2% 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-2026-84091: held from 0.002 to 0.003.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

  • Sumit Payment Gateway For Woocommerce

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-84091?
CVE-2026-84091 is a medium-severity vulnerability in Sumit Payment Gateway For Woocommerce, classified under Improper Authentication. CVSS score: 5.3/10. Published 2026-09-23.
How severe is CVE-2026-84091?
Medium severity. CVSS v3 base score is 5.3 out of 10.