CVE-2026-43641 Details
Description
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.
A command injection vulnerability has been identified in Softaculous Virtualizor versions prior to 3.2.9 (Patch 9) and 3.0.0. The issue resides in the billing module handler, where unauthenticated remote attackers can execute arbitrary commands as root. Exploitation involves deserializing a crafted 'billing_data' POST field and injecting shell payloads through the 'uid' field, which is then passed unmodified to 'proc_open()' via 'vexec()'. This vulnerability provides complete control over the host and all managed VPS instances.
Users are advised to update to Virtualizor version 3.2.9 Patch 9 or 3.3.0, both of which address this vulnerability. After updating, ensure that the admin panel ports are not exposed to the public internet or are behind an allowlist.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 22, 2026CISA-ADP
Assessed Sep 23, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.virtualizor.com/blog/virtualizor-3-2-9-launched-release-candidate-patch-9/ | [email protected] | Release NotesVendor |
| https://www.virtualizor.com/blog/virtualizor-3-3-0/ | [email protected] | Release NotesVendor |
| https://www.vulncheck.com/advisories/softaculous-virtualizor-os-command-injection-via-billing-module-handler | [email protected] | Advisory |
| https://www.vulncheck.com/blog/virtualizor-billing-hook-unauthenticated-root-rce | [email protected] | BundleExploitRemedyTechnical Analysis |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-78 | Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Softaculous Virtualizor | < 3.2.9 (Patch 9) < 3.0.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 23, 2026 | CVE Modified | CISA-ADP |
| Sep 22, 2026 | New CVE Received | [email protected] |