Froxlor is open source server administration software. Prior to 2.3.4, a typo in Froxlor's input validation code (== instead of =) completely disables email format checking for all settings fields declared as email type. This allows an authenticated admin to store arbitrary strings in the panel.adminmail setting. This value is later concatenated into a shell command executed as root by a cron job, where the pipe character | is explicitly whitelisted. The result is full root-level Remote Code Execution. This vulnerability is fixed in 2.3.4.
History

Tue, 03 Mar 2026 22:45:00 +0000

Type Values Removed Values Added
Description Froxlor is open source server administration software. Prior to 2.3.4, a typo in Froxlor's input validation code (== instead of =) completely disables email format checking for all settings fields declared as email type. This allows an authenticated admin to store arbitrary strings in the panel.adminmail setting. This value is later concatenated into a shell command executed as root by a cron job, where the pipe character | is explicitly whitelisted. The result is full root-level Remote Code Execution. This vulnerability is fixed in 2.3.4.
Title Froxlor Admin-to-Root Privilege Escalation via Input Validation Bypass + OS Command Injection
Weaknesses CWE-482
CWE-78
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-03T22:31:58.516Z

Reserved: 2026-02-12T17:10:53.414Z

Link: CVE-2026-26279

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-03-03T23:15:55.223

Modified: 2026-03-03T23:15:55.223

Link: CVE-2026-26279

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.