CVE-2026-41228

Name: CVE-2026-41228
Creator: NVD / NIST
Published: 2026-04-23T04:16:19.193+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.9/10EPSS 0.52%

Last modified Jun 17, 2026

CVE-2026-41228 is a critical-severity vulnerability rated 9.9/10 on the CVSS scale. 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. EPSS estimates a 0.52% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.9/10

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

EPSS Probability

0.52%

40.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-98

Affected Software

Vendor	Product	Versions
Froxlor	Froxlor	< 2.3.6

References

https://github.com/froxlor/froxlor/commit/bc5e6dbaa90e6f3573129da640595e8c770e1d0cPatch
https://github.com/froxlor/froxlor/releases/tag/2.3.6Release Notes
https://github.com/froxlor/froxlor/security/advisories/GHSA-w59f-67xm-rxx7Exploit, Mitigation, Vendor Advisory
https://github.com/froxlor/froxlor/security/advisories/GHSA-w59f-67xm-rxx7Exploit, Mitigation, Vendor Advisory

Timeline

Published: Apr 23, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-41228?

How severe is CVE-2026-41228?

CVE-2026-41228 has a CVSS score of 9.9/10 (CRITICAL severity). The EPSS model estimates a 0.52% probability of exploitation in the next 30 days.

How do I fix CVE-2026-41228?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-41228?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST