CVE-2026-34234: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in Ctrlpanel-gg panel
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
Technical Summary
CtrlPanel-gg panel versions prior to 1.2.0 have an OS command injection vulnerability (CWE-78) in the web installer component (public/installer/index.php). The issue results from premature execution of form handlers before verifying the presence of an install.lock file, combined with unsafe incorporation of user input into shell commands. This allows unauthenticated remote attackers to execute arbitrary commands on the server. The vulnerability is addressed in version 1.2.0.
Potential Impact
Successful exploitation allows unauthenticated remote attackers to execute arbitrary OS commands on the affected server, leading to full compromise of confidentiality, integrity, and availability. The vulnerability is critical with a CVSS 3.1 base score of 10.0, reflecting network attack vector, no privileges required, no user interaction, and complete system compromise.
Mitigation Recommendations
Upgrade CtrlPanel to version 1.2.0 or later, where this vulnerability has been fixed. No other official remediation or temporary fixes are documented. Patch status is not explicitly stated but the vendor has released a fixed version, so applying this update is the recommended action.
CVE-2026-34234: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in Ctrlpanel-gg panel
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.
CVSS v3.1
Score 10.0critical
Affected software
pkg:github/ctrlpanel-gg/panelRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CtrlPanel-gg panel versions prior to 1.2.0 have an OS command injection vulnerability (CWE-78) in the web installer component (public/installer/index.php). The issue results from premature execution of form handlers before verifying the presence of an install.lock file, combined with unsafe incorporation of user input into shell commands. This allows unauthenticated remote attackers to execute arbitrary commands on the server. The vulnerability is addressed in version 1.2.0.
Potential Impact
Successful exploitation allows unauthenticated remote attackers to execute arbitrary OS commands on the affected server, leading to full compromise of confidentiality, integrity, and availability. The vulnerability is critical with a CVSS 3.1 base score of 10.0, reflecting network attack vector, no privileges required, no user interaction, and complete system compromise.
Mitigation Recommendations
Upgrade CtrlPanel to version 1.2.0 or later, where this vulnerability has been fixed. No other official remediation or temporary fixes are documented. Patch status is not explicitly stated but the vendor has released a fixed version, so applying this update is the recommended action.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-26T16:22:29.034Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a0cd72dba1db47362f031e4
Added to database: 05/19/2026, 21:33:33 UTC
Last enriched: 05/19/2026, 21:48:33 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 113
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