CVE-2026-67398NVD

Vulnerability Summary

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.

Severity Level

HIGH(8.2)

Published Date

Sep 3, 2026

Last Modified

Sep 14, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.48%Probability

Root Weakness (CWE)

CWE-862: Missing Authorization ↗

The software does not perform an authorization check when an actor attempts to access a resource or perform an action.

CVSS v4.0 Base Metrics — Score 8.2 (HIGH)

Attack VectorNetwork

Attack ComplexityLow

Attack RequirementsPresent

Privileges RequiredNone

User InteractionNone

Confidentiality (Vulnerable System)High

Integrity (Vulnerable System)None

Availability (Vulnerable System)None

Confidentiality (Subsequent System)None

Integrity (Subsequent System)None

Availability (Subsequent System)None

Affected & Patched Versions

Affected Versions

WebPros WHMCS >= 4.5.0 and < 8.12.2
WebPros WHMCS >= 8.13.0 and < 8.13.7
WebPros WHMCS >= 9.0.0 and < 9.0.8

Patched Versions

WebPros WHMCS 8.12.2
WebPros WHMCS 8.13.7
WebPros WHMCS 9.0.8

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