Softaculous Virtualizor up to 3.2.8 Billing unserialize act/from_billing_module/billing_data deserialization

Summaryinfo

A vulnerability categorized as very critical has been discovered in Softaculous Virtualizor up to 3.2.8. This affects the function unserialize of the component Billing Module Handler. The manipulation of the argument act/from_billing_module/billing_data results in deserialization. This vulnerability is known as CVE-2026-43642. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Softaculous Virtualizor up to 3.2.8. It has been classified as very critical. Affected is the function unserialize of the component Billing Module Handler. The manipulation of the argument act/from_billing_module/billing_data with an unknown input leads to a deserialization vulnerability. CWE is classifying the issue as CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Softaculous Virtualizor before 3.2.9 (Patch 9) and 3.0.0 contains a PHP object injection vulnerability in the billing module handler that allows unauthenticated remote attackers to supply arbitrary serialized PHP objects for deserialization by setting the act parameter to login with the from_billing_module parameter present. Attackers can pass malicious serialized data through the billing_data POST field to the unserialize() function without allowed_classes restrictions, enabling exploitation of available POP chains to achieve remote code execution as root.

The advisory is available at vulncheck.com. This vulnerability is traded as CVE-2026-43642 since 05/01/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/22/2026).

Upgrading to version 3.2.9 eliminates this vulnerability. Applying the patch Patch 9 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion