CVE-2026-67398

Published Sep 3, 2026 CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

Vendor Workaround

Deactivate 2Checkout payment gateway.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title WHMCS 2Checkout Payment Gateway Missing Authorization Exposes Customer Data
Type Values Removed Values Added
Description Missing authorization vulnerability has been discovered in 2Checkout payment gateway of WHMCS from 8.13.0 before 8.13.8, 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. 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.
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Webpros
Webpros whmcs
Vendors & Products Webpros
Webpros whmcs
Type Values Removed Values Added
Title WHMCS 2Checkout Payment Gateway Missing Authorization Exposes Customer Data
Type Values Removed Values Added
Description Missing authorization vulnerability has been discovered in 2Checkout payment gateway of WHMCS from 8.13.0 before 8.13.8, 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.
Weaknesses CWE-862
References
Metrics cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
hackerone
Published
Updated
Sep 14, 2026, 8:53 PM
Reserved
Jul 29, 2026, 3:00 PM
Status
Deferred
Published
Sep 4, 2026, 12:17 AM
Modified
Sep 14, 2026, 9:17 PM