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CVE-2026-67399

Quick assessment

Affected
WebPros WHMCS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WHMCS 9.0.0 版本（早于 9.0.8）和 8.0.0 版本（早于 8.13.7）中存在反序列化不可信数据的漏洞，允许远程攻击者执行任意代码。

CVSS 9.3 · Critical

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-67399

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
WebPros WHMCS 9.0.0 ~ 9.0.8 -

II. Public POCs for CVE-2026-67399

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III. Intelligence Information for CVE-2026-67399

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Vendor Advisories for CVE-2026-67399 (1)

IV. Related Vulnerabilities

Same product: WHMCS
Same vendor: WebPros
Same weakness: CWE-502

V. Comments for CVE-2026-67399

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