CVE-2026-41228
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.
How to fix
- froxlor froxlor2.3.6 or later
- froxlor/froxlor2.3.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| froxlor froxlor | v < 2.3.6 | 2.3.6 |
| froxlor/froxlorPackagist | v < 2.3.6 | 2.3.6 |
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