RCE in Softaculous Virtualizor
CVE-2026-43641
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- www.vulncheck.com/blog/virtualizor-billing-hook-unauthenticated-root-rce (technical-description, exploit)
- www.virtualizor.com/blog/virtualizor-3-2-9-launched-release-candidate-patch-9/ (release-notes, patch)
- www.virtualizor.com/blog/virtualizor-3-3-0/ (release-notes, patch)
- www.vulncheck.com/advisories/softaculous-virtualizor-os-command-injection-via-b… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-43641?
- CVE-2026-43641 is a critical-severity vulnerability in Softaculous Virtualizor, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-09-22.
- How severe is CVE-2026-43641?
- Critical severity. CVSS v3 base score is 9.8 out of 10.