Authorization Bypass Vulnerability in Softaculous Virtualizor Billing Module
CVE-2026-43643

8.7HIGH

Key Information:

Vendor

Softaculous

Status
Virtualizor
Vendor
CVE Published:
22 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-43643?

The Softaculous Virtualizor software contains a vulnerability in its billing module that allows attackers to bypass authorization mechanisms. This enables unauthorized users to modify a tenant's account balance by sending crafted POST requests to the admin panel. By manipulating parameters such as 'act' and 'from_billing_module', attackers can execute an unauthorized parameterized UPDATE on the users table. This flaw poses significant risks, including the potential for automated service suspensions and financial manipulation of user accounts.

Affected Version(s)

Virtualizor 0 < 3.2.9 (Patch 9)

Virtualizor 3.0.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-43643 - Proof of Concept

References

https://www.vulncheck.com/blog/virtualizor-billing-hook-u...
technical-descriptionexploit
https://www.virtualizor.com/blog/virtualizor-3-2-9-launch...
release-notespatch
https://www.virtualizor.com/blog/virtualizor-3-3-0/
release-notespatch

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Valentin Lobstein (Chocapikk)
VulnCheck
.