RCE in Softaculous Virtualizor
CVE-2026-43641
Softaculous Virtualizor before 3.2.9 (Patch 9) and 3.0.0 contains an OS command injection vulnerability in the billing module handler that allows unauthenticated remote attackers to execute arbitrary commands as root by bypassing authentication through specific parameter combinations. Attackers can deserialize a crafted billing_data POST field and inject shell payloads through the uid field, which is passed unmodified to proc_open() via vexec(), yielding complete control of the host and all managed VPS instances.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.030 (87.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000
Affected products
Weakness classification (CWE)
References
- VulnCheck Blog (technical-description, exploit)
- 3.2.9 Patch 9 Release Notes (release-notes, patch)
- 3.3.0 Release Notes (release-notes, patch)
- www.vulncheck.com/advisories/softaculous-virtualizor-os-command-injection-via-b… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-43641?
- CVE-2026-43641 is a critical-severity vulnerability in Softaculous Virtualizor, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-09-22.
- How severe is CVE-2026-43641?
- Critical severity. CVSS v3 base score is 9.8 out of 10.