# CVE-2026-41228

## Summary

- **CVE ID:** CVE-2026-41228
- **Severity:** CRITICAL
- **CVSS Score:** 10 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H)
- **CWE:** CWE-98
- **Published:** Apr 23, 2026
- **Last Modified:** Apr 23, 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.

## Affected Products

- froxlor — froxlor (< 2.3.6)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.52%
- **EPSS Percentile:** 43.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._