OS Command Injection in Softaculous Virtualizor Billing Module
CVE-2026-43641

9.3CRITICAL

Key Information:

Vendor

Softaculous

Status
Virtualizor
Vendor
CVE Published:
22 September 2026

Badges

👾 Exploit Exists

What is CVE-2026-43641?

An OS command injection vulnerability exists in the billing module handler of Softaculous Virtualizor versions prior to 3.2.9 and 3.0.0, allowing unauthenticated remote attackers to execute arbitrary commands as root. By manipulating the billing_data POST field with crafted parameters, attackers can inject shell commands through the uid field, which are processed unmodified by proc_open() via vexec(). This flaw exposes the host system and all managed Virtual Private Servers (VPS) to complete control by malicious actors.

Affected Version(s)

Virtualizor 0 < 3.2.9 (Patch 9)

Virtualizor 3.0.0

References

https://www.vulncheck.com/blog/virtualizor-billing-hook-u...
technical-descriptionexploit
https://www.virtualizor.com/blog/virtualizor-3-2-9-launch...
release-notespatch
https://www.virtualizor.com/blog/virtualizor-3-3-0/
release-notespatch

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Valentin Lobstein (Chocapikk)
VulnCheck
.