CVE-2026-67398: WebPros Whmcs

High severity, CVSS 8.2. EPSS: 0.5% chance of exploitation in the next 30 days.

Missing authorization vulnerability has been discovered in 2Checkout payment gateway of WHMCS from 8.13.0 before 8.13.7, from 9.0.0 before 9.0.8, all other EOL versions from 4.5.0. The vulnerability allows an unauthenticated user to get WHMCS customer's data via 2Checkout payment gateway's endpoint under specific conditions.

Affected products

• WebPros Whmcs: from 4.5.0, before 8.12.2 (fixed in 8.12.2); from 8.13.0, before 8.13.7 (fixed in 8.13.7); from 9.0.0, before 9.0.8 (fixed in 9.0.8)

Published 2026-09-04. Last modified 2026-09-14.