What’s Vulnerable › Vulnerabilities
CVE-2026-67399
- Severity: critical (CVSS 9.3 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.8% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-14 · updated 2026-09-18
- Weakness: CWE-502
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.
Affected products
- WebPros WHMCS: from 9.0.0 before 9.0.8; from 8.0.0 before 8.13.7 — fixed in 8.13.7, 9.0.8
How to fix
Upgrade to a fixed version: WebPros WHMCS 8.13.7, 9.0.8. Check the vendor advisory for mitigations.
References
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