What is CVE-2026-103324?

CVE-2026-103324 is a medium-severity vulnerability in Cardinity Payment Gateway For Woocommerce, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.3/10. Published 2026-10-15.

How severe is CVE-2026-103324?

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

Vulnerability in Cardinity Payment Gateway For Woocommerce

CVE-2026-103324

The Cardinity Payment Gateway for WooCommerce WordPress plugin before 3.4.2 does not properly verify the authenticity of the payment notifications it receives, as the secret used to sign them is empty by default, allowing unauthenticated attackers to forge an approved-payment notification and mark arbitrary orders as paid, or force them to failed.

Published 2026-10-15 · last modified 2026-10-15.

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

Cardinity Payment Gateway For Woocommerce

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

wpscan.com/vulnerability/4e23c520-bb92-47b8-a617-0d334820db50/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-103324?: CVE-2026-103324 is a medium-severity vulnerability in Cardinity Payment Gateway For Woocommerce, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.3/10. Published 2026-10-15.
How severe is CVE-2026-103324?: Medium severity. CVSS v3 base score is 5.3 out of 10.