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Vulnerability record · CVE-2026-43641 · published 22 September 2026

CVE-2026-43641: OS command injection vulnerability

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.

9.3 CVSS 4.0 Critical EPSS 3.0% · top 13.0% CWE-78 · OS command injection Deferred
9.3CVSS 4.0 base score
3.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
23 Sep 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-43641), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.