CVE-2026-41228CWE-98

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

Critical · published April 23, 2026

CVSS v3.1
10.0
EPSS
1%
Percentile
54.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00749 · 54.4th percentile
Weakness
CWE-98 · Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
Published
2026-04-23T03:41Z
EPSS history
Timeline
  • 23 APR 03:41Z
    Froxlor has Local File Inclusion via path traversal in API `def_language` parameter that leads to Remote Code Execution
    cvelistv5