Froxlor up to 2.3.5 API Endpoint Language::loadLanguage def_language php file inclusion

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Froxlor up to 2.3.5. It has been rated as critical. This vulnerability affects the function Language::loadLanguage of the component API Endpoint. This manipulation of the argument def_language causes php file inclusion. This vulnerability is registered as CVE-2026-41228. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Froxlor up to 2.3.5. Affected by this vulnerability is the function Language::loadLanguage of the component API Endpoint. The manipulation of the argument def_language with an unknown input leads to a php file inclusion vulnerability. The CWE definition for the vulnerability is CWE-98. The PHP application receives input from an upstream component, but it does not restrict or incorrectly restricts the input before its usage in "require," "include," or similar functions. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-41228 since 04/18/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available.

Upgrading to version 2.3.6 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch bc5e6dbaa90e6f3573129da640595e8c770e1d0c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-25176) and CERT Bund (WID-SEC-2026-1124). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Open Source Froxlor

Productinfo

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.9
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Php file inclusion
CWE: CWE-98 / CWE-73
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Froxlor 2.3.6
Patch: bc5e6dbaa90e6f3573129da640595e8c770e1d0c

Timelineinfo

04/18/2026 CVE reserved
04/23/2026 +5 days Advisory disclosed
04/23/2026 +0 days VulDB entry created
04/23/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-w59f-67xm-rxx7
Status: Confirmed

CVE: CVE-2026-41228 (🔒)
GCVE (CVE): GCVE-0-2026-41228
GCVE (VulDB): GCVE-100-359065
EUVD: 🔒
CERT Bund: WID-SEC-2026-1124 - Froxlor: Mehrere Schwachstellen

Entryinfo

Created: 04/23/2026 06:39
Updated: 04/23/2026 10:58
Changes: 04/23/2026 06:39 (68), 04/23/2026 09:38 (7), 04/23/2026 10:58 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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