What is CVE-2026-103300?

CVE-2026-103300 is a medium-severity vulnerability in Eurobank Woocommerce Payment Gateway, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.3/10. Published 2026-10-26.

How severe is CVE-2026-103300?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Eurobank Woocommerce Payment Gateway

CVE-2026-103300

The Eurobank WooCommerce Payment Gateway WordPress plugin through 2.1.1 does not verify that a payment-confirmation request genuinely originates from the payment provider, and ships with the secret that would authenticate it empty by default, allowing unauthenticated attackers to mark any pending order as paid, and to force any order into a failed status without any secret at all.

Published 2026-10-26 · last modified 2026-10-26.

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

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Eurobank Woocommerce Payment Gateway

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

wpscan.com/vulnerability/37851403-0765-4fc2-80f6-f70d3fc34a88/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-103300?: CVE-2026-103300 is a medium-severity vulnerability in Eurobank Woocommerce Payment Gateway, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.3/10. Published 2026-10-26.
How severe is CVE-2026-103300?: Medium severity. CVSS v3 base score is 5.3 out of 10.