EUVD-2026-84622
GHSA-gjf4-862p-rg96
Severity by source
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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
Unauthenticated network POST reaches unserialize() with no allowed_classes; public POC demonstrates a reliable chain (AC:L, not H); root RCE gives full C/I/A; S:U to align with vendor SC:N though S:C is arguable.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
Remote code execution in Softaculous Virtualizor before 3.2.9 Patch 9 (and the 3.0.0 line) allows unauthenticated remote attackers to execute arbitrary commands as root by exploiting a PHP object injection flaw in the billing module handler, where untrusted serialized data in the billing_data POST field is passed to unserialize() without allowed_classes restrictions. Publicly available exploit code exists. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No authentication required (PR:N) and no user interaction (UI:N): a remote attacker directly triggers the vulnerable code path by sending act=login together with the from_billing_module parameter and a malicious serialized payload in the billing_data POST field to a network-reachable Virtualizor instance running a version before 3.2.9 Patch 9 (or the 3.0.0 line). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-priority issue, not a paper-tiger high-CVSS finding. … 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 | Apply the vendor-released patch: upgrade to Virtualizor 3.2.9 Patch 9 or 3.3.0 (see 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 all Softaculous Virtualizor deployments, prioritize any internet-facing instances running versions before 3.2.9 Patch 9 or on the affected 3.0.0 line, and apply the vendor-released patch: 3.2.9 Patch 9 (confirm and apply the corresponding 3.0.0-line update from the vendor advisory). …
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External POC / Exploit Code
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