CVE-2026-41228
Froxlor has Local File Inclusion via path traversal in API `def_language` parameter that leads to Remote Code Execution
- State
- Published
- Severity
- 10.0 Critical
- Published
- Apr 23, 2026
- Updated
- Apr 23, 2026
- Reserved
- Apr 18, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 10.0 Critical | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | GitHub_M |
Weaknesses
- CWE-98 Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
Affected Products
| Product | Versions |
|---|---|
froxlorfroxlor |
|
References
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