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CVE-2026-67398

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…

High8.2EPSS 0.47%
Published
Updated
Reserved
Assigned by
hackerone

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.

Scores

CVSS scores of CVE-2026-67398, by who scored it
Scored byCVSSScoreVector
hackeroneCNA (assigner)4.0High8.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
NVDNVD · Deferred4.0High8.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS (exploitation in 30 days)
0.47% · top 59% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.2.

Weakness

Affected products

  • WebPros · WHMCS

    • affected 4.5.0 – < 8.12.2
    • affected 8.13.0 – < 8.13.7
    • affected 9.0.0 – < 9.0.8

What to do

Workaround: Deactivate 2Checkout payment gateway.

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .