Auth bypass in Scott Paterson Contact Form 7 – Paypal & Stripe Add-On

CVE-2026-66660

Unauthenticated Broken Access Control in Contact Form 7 – PayPal & Stripe Add-on <= 2.5.1 versions.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (23.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.9% 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-2026-66660: held from 0.002 to 0.003.

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

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-66660?
CVE-2026-66660 is a medium-severity vulnerability in Scott Paterson Contact Form 7 – Paypal & Stripe Add-On, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-08-13.
How severe is CVE-2026-66660?
Medium severity. CVSS v3 base score is 6.5 out of 10.