Vulnerability in Robokassa Payment Gateway For Woocommerce

CVE-2026-91017

The Robokassa payment gateway for Woocommerce WordPress plugin before 1.8.9 does not verify the authenticity of incoming payment notifications when its non-default deferred-payment feature is enabled, allowing unauthenticated attackers to forge a notification and mark arbitrary WooCommerce orders as paid or on-hold without payment or a valid signature.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.001 (3.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.0% 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-2026-91017: held from 0.001 to 0.001.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

  • Robokassa Payment Gateway For Woocommerce

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-91017?
CVE-2026-91017 is a low-severity vulnerability in Robokassa Payment Gateway For Woocommerce, classified under Insufficient Verification of Data Authenticity. CVSS score: 3.7/10. Published 2026-09-17.
How severe is CVE-2026-91017?
Low severity. CVSS v3 base score is 3.7 out of 10.