What’s Vulnerable › Vulnerabilities

CVE-2026-43641: Softaculous Virtualizor OS Command Injection via Billing Module Handler

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-22 · updated 2026-09-23
• Weakness: CWE-78

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.

Affected products

• Softaculous Virtualizor: before 3.2.9 (Patch 9) — fixed in 3.2.9 (Patch 9)

How to fix

Upgrade to a fixed version: Softaculous Virtualizor 3.2.9 (Patch 9). Check the vendor advisory for mitigations.

References

• 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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