CtrlPanel is open-source billing software for hosting providers. In versions 1.1.1 and prior, the web-based installer (public/installer/index.php) is vulnerable to unauthenticated Remote Code Execution (RCE) because it performs the install.lock check only after including and executing form handler files, leaving installer endpoints reachable on already-installed instances. The handlers also pass unsanitized user input directly into shell commands, allowing an attacker to submit crafted requests that execute arbitrary commands on the server. The vulnerability stems from two combined weaknesses: (1) premature form handler execution before the lock file gate, and (2) unsafe use of user input in shell command construction. This issue is reported to be actively exploited in the wild. The issue has been fixed in version 1.2.0.

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Fixes

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History

Wed, 20 May 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 20 May 2026 11:45:00 +0000

Type Values Removed Values Added
First Time appeared Ctrlpanel-gg
Ctrlpanel-gg panel
Vendors & Products Ctrlpanel-gg
Ctrlpanel-gg panel

Tue, 19 May 2026 21:30:00 +0000

Type Values Removed Values Added
Description CtrlPanel is open-source billing software for hosting providers. In versions 1.1.1 and prior, the web-based installer (public/installer/index.php) is vulnerable to unauthenticated Remote Code Execution (RCE) because it performs the install.lock check only after including and executing form handler files, leaving installer endpoints reachable on already-installed instances. The handlers also pass unsanitized user input directly into shell commands, allowing an attacker to submit crafted requests that execute arbitrary commands on the server. The vulnerability stems from two combined weaknesses: (1) premature form handler execution before the lock file gate, and (2) unsafe use of user input in shell command construction. This issue is reported to be actively exploited in the wild. The issue has been fixed in version 1.2.0.
Title CtrlPanel: Unauthenticated RCE using installer script
Weaknesses CWE-284
CWE-78
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-20T15:45:56.882Z

Reserved: 2026-03-26T16:22:29.034Z

Link: CVE-2026-34234

cve-icon Vulnrichment

Updated: 2026-05-20T14:36:33.190Z

cve-icon NVD

Status : Deferred

Published: 2026-05-19T22:16:37.123

Modified: 2026-05-20T14:06:33.993

Link: CVE-2026-34234

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-20T10:38:59Z

Weaknesses