CtrlPanel: Unauthenticated RCE using installer script_CVE-2026-34234

10 / 10

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

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.

AI Analysis

Unauthenticated Remote Code Execution vulnerability in CtrlPanel due to premature form handler execution and unsafe use of user input in shell command construction

Basic Information

ID CVE-2026-34234

Source GitHub_M

Published May 19, 2026 at 21:03

Affected Product

Vendor Ctrlpanel-gg

Product panel

Version < 1.2.0

Affected Versions Ctrlpanel-gg panel < 1.2.0

CWE Classification

CWE-78 CWE-284

AI Assessment

AI Score 10 / 10

AI Severity Critical

Vendor Ctrlpanel-gg

Product CtrlPanel

Version 1.1.1 and prior

References

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