CVE-2026-41228

CRITICAL 10.0

Froxlor has Local File Inclusion via path traversal in API `def_language` parameter that leads to Remote Code Execution

CVSS Score

10.0

EPSS Score

0.0%

EPSS Percentile

0th

Froxlor is open source server administration software. Prior to version 2.3.6, the Froxlor API endpoint `Customers.update` (and `Admins.update`) does not validate the `def_language` parameter against the list of available language files. An authenticated customer can set `def_language` to a path traversal payload (e.g., `../../../../../var/customers/webs/customer1/evil`), which is stored in the database. On subsequent requests, `Language::loadLanguage()` constructs a file path using this value and executes it via `require`, achieving arbitrary PHP code execution as the web server user. Version 2.3.6 fixes the issue.

CWE	CWE-98
Vendor	froxlor
Product	froxlor
Published	Apr 23, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

froxlor / froxlor

< 2.3.6

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/froxlor/froxlor/security/advisories/GHSA-w59f-67xm-rxx7 github.com: https://github.com/froxlor/froxlor/commit/bc5e6dbaa90e6f3573129da640595e8c770e1d0c github.com: https://github.com/froxlor/froxlor/releases/tag/2.3.6