Softaculous Virtualizor up to 3.2.8 Billing proc_open uid os command injection

Summaryinfo

A vulnerability identified as very critical has been detected in Softaculous Virtualizor up to 3.2.8. This impacts the function proc_open of the component Billing Module Handler. This manipulation of the argument uid causes os command injection. This vulnerability is handled as CVE-2026-43641. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Softaculous Virtualizor up to 3.2.8. It has been declared as very critical. Affected by this vulnerability is the function proc_open of the component Billing Module Handler. The manipulation of the argument uid with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at vulncheck.com. This vulnerability is known as CVE-2026-43641 since 05/01/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/22/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

Upgrading to version 3.2.9 eliminates this vulnerability.

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Productinfo

Vendor

• Softaculous

Name

• Virtualizor

Version

• 3.2.0
• 3.2.1
• 3.2.2
• 3.2.3
• 3.2.4
• 3.2.5
• 3.2.6
• 3.2.7
• 3.2.8

CPE 2.3info

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CPE 2.2info

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