Softaculous Virtualizor PHP Object Injection via Billing Module Handler (CVE-2026-43642) | HOL Guard CVE

Critical · CVSS 9.2CVE-2026-43642

Softaculous Virtualizor PHP Object Injection via Billing Module Handler

Answer in brief

CVE-2026-43642 records a Critical severity (CVSS 9.2) vulnerability in Softaculous Virtualizor PHP Object Injection via Billing Module Handler. The current sources do not mark it as known exploited. The current feed maps Softaculous/Virtualizor (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 22, 2026Updated Sep 22, 2026Source checked Sep 22, 2026First seen by HOL Sep 22, 2026Material review Sep 22, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.2
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 9.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Softaculous/Virtualizor (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Softaculous/Virtualizorgeneric	>=0 <3.2.9 (Patch 9)	3.2.9 (Patch 9)

Recommended response

Check inventory. Check lockfiles and deployed manifests for Softaculous/Virtualizor.
Review the reported fix. Update Softaculous/Virtualizor to 3.2.9 (Patch 9) if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 22, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.