CVE-2026-41228

critical · 9.9

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.

9.9

CVSS

0.5%

EPSS (exploit prob.)

43rd

EPSS percentile

2026-04-23

Published

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

Weaknesses

CWE-98

Affected products

Vendor	Product	Affected versions
froxlor	froxlor	< 2.3.6

Check a specific version with /api/v1/cve/match.

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-41228