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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://www.virtualizor.com/blog/virtualizor-3-2-9-launched-release-candidate-p…
disclosure@vulncheck.com
https://www.virtualizor.com/blog/virtualizor-3-3-0/
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/softaculous-virtualizor-os-command-injecti…
disclosure@vulncheck.com
https://www.vulncheck.com/blog/virtualizor-billing-hook-unauthenticated-root-rce
disclosure@vulncheck.com