Description
Deserialization of untrusted data in WHMCS 9.0.0 before 9.0.8 and 8.0.0 before 8.13.7 allows remote attackers to execute arbitrary code.
Published: 2026-09-14
Score: 9.3 Critical
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 16 Sep 2026 10:15:00 +0000

Type Values Removed Values Added
Title WHMCS Unsafe Deserialization Enables Remote Code Execution

Tue, 15 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 15 Sep 2026 02:00:00 +0000

Type Values Removed Values Added
First Time appeared Webpros
Webpros whmcs
Vendors & Products Webpros
Webpros whmcs

Mon, 14 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Description Deserialization of untrusted data in WHMCS 9.0.0 before 9.0.8 and 8.0.0 before 8.13.7 allows remote attackers to execute arbitrary code.
Weaknesses CWE-502
References
Metrics cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published:

Updated: 2026-09-15T13:28:24.720Z

Reserved: 2026-07-29T15:00:02.294Z

Link: CVE-2026-67399

cve-icon Vulnrichment

Updated: 2026-09-15T13:28:20.987Z

cve-icon NVD

Status : Received

Published: 2026-09-14T21:17:25.423

Modified: 2026-09-15T14:17:06.623

Link: CVE-2026-67399

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-16T10:00:15Z

Weaknesses