CVE-2026-43641

CRITICAL 9.8

Softaculous Virtualizor OS Command Injection via Billing Module Handler

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

Softaculous Virtualizor before 3.2.9 (Patch 9) and 3.0.0 contains an OS command injection vulnerability in the billing module handler that allows unauthenticated remote attackers to execute arbitrary commands as root by bypassing authentication through specific parameter combinations. Attackers can deserialize a crafted billing_data POST field and inject shell payloads through the uid field, which is passed unmodified to proc_open() via vexec(), yielding complete control of the host and all managed VPS instances.

CWE	CWE-78
Vendor	softaculous
Product	virtualizor
Published	Sep 22, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Softaculous / Virtualizor

0 < 3.2.9 (Patch 9)

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vulncheck.com: https://www.vulncheck.com/blog/virtualizor-billing-hook-unauthenticated-root-rce virtualizor.com: https://www.virtualizor.com/blog/virtualizor-3-2-9-launched-release-candidate-patch-9/ virtualizor.com: https://www.virtualizor.com/blog/virtualizor-3-3-0/ vulncheck.com: https://www.vulncheck.com/advisories/softaculous-virtualizor-os-command-injection-via-billing-module-handler

Credits

Valentin Lobstein (Chocapikk) VulnCheck