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Softaculous Virtualizor EUVDEUVD-2026-84624

| CVE-2026-43643 HIGH
Missing Authorization (CWE-862)
2026-09-22 VulnCheck GHSA-g658-6cgx-fx2p
8.7
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
8.7 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
7.5 HIGH

Unauthenticated network exploit of a missing authorization check (PR:N, AC:L); impact is integrity-only rewrite of the users table (I:H), with no direct confidentiality or availability effect (C:N/A:N).

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
POC Analysis Generated
Sep 22, 2026 - 19:21 vuln.today
Analysis Generated
Sep 22, 2026 - 18:27 vuln.today
CVE Published
Sep 22, 2026 - 17:54 cve.org
HIGH 8.7

DescriptionCVE.org

Softaculous Virtualizor before 3.2.9 (Patch 9) and 3.0.0 contains an authorization bypass vulnerability in the billing module handler that allows unauthenticated remote attackers to modify any tenant's account balance by supplying crafted act and from_billing_module parameters to the admin panel dispatcher. Attackers can send a POST request with arbitrary uid and balance values in the billing_data field to trigger an unauthenticated parameterized UPDATE against the users table, enabling account balance manipulation and potential automated service suspension for targeted accounts.

AnalysisAI

Unauthenticated attackers can rewrite any tenant's account balance in Softaculous Virtualizor before 3.2.9 (Patch 9) and in 3.0.0 by POSTing crafted 'act' and 'from_billing_module' parameters together with a 'billing_data' body containing arbitrary uid and balance values to the admin panel dispatcher, which executes a parameterized UPDATE against the users table without performing any authorization check. Publicly available exploit code exists, and vendor patches are available (3.2.9 Patch 9 and 3.3.0). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation No special conditions - remote unauthenticated exploitation against default configurations of Softaculous Virtualizor before 3.2.9 Patch 9 (and version 3.0.0). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a real, actionable priority. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to the vendor-released patch: Virtualizor 3.2.9 Patch 9, or the 3.3.0 release, per the advisories at https://www.virtualizor.com/blog/virtualizor-3-2-9-launched-release-candidate-patch-9/ and https://www.virtualizor.com/blog/virtualizor-3-3-0/. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory every internet-reachable Virtualizor admin panel, confirm the running version, and where the panel cannot be immediately upgraded restrict access to trusted management networks or a VPN via firewall rules or the vendor's IP allowlist; simultaneously capture a baseline of current tenant balances and billing records so that any tampering can be detected and reversed, and review dispatcher and billing-module logs for POST requests containing unusual 'act' or 'from_billing_module' parameters. …

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EUVD-2026-84624 vulnerability details – vuln.today

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