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CVE-2026-41228— Froxlor has Local File Inclusion via path traversal in API `def_language` parameter that leads to Remote Code Execution

Quick assessment

Affected
froxlor froxlor
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Froxlor是Froxlor团队的一套轻量级服务器管理软件。 Froxlor 2.3.6之前版本存在安全漏洞，该漏洞源于API端点Customers.update和Admins.update未验证def_language参数，允许经过身份验证的客户设置路径遍历载荷，导致任意PHP代码执行。

CVSS 10.0 · Critical EPSS 0.75% · P53
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I. Basic Information for CVE-2026-41228

Vulnerability Information
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Vulnerability Title
Froxlor has Local File Inclusion via path traversal in API `def_language` parameter that leads to Remote Code Execution
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
PHP程序中Include/Require语句包含文件控制不恰当(PHP远程文件包含)
Source: CVE Program / CVE List V5
Vulnerability Title
Froxlor 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Froxlor是Froxlor团队的一套轻量级服务器管理软件。 Froxlor 2.3.6之前版本存在安全漏洞，该漏洞源于API端点Customers.update和Admins.update未验证def_language参数，允许经过身份验证的客户设置路径遍历载荷，导致任意PHP代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
froxlor froxlor < 2.3.6 -

II. Public POCs for CVE-2026-41228

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III. Intelligence Information for CVE-2026-41228

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Patches & Fixes for CVE-2026-41228 (1)

Vendor Advisories for CVE-2026-41228 (1)

Same Patch Batch · froxlor · 2026-04-23 · 6 CVEs total

CVE-2026-41229 9.1 CRITICAL Froxlor has a PHP Code Injection via Unescaped Single Quotes in userdata.inc.php Generatio
CVE-2026-41230 8.5 HIGH Froxlor has a BIND Zone File Injection via Unsanitized DNS Record Content in DomainZones::
CVE-2026-41231 7.5 HIGH Froxlor has Incomplete Symlink Validation in DataDump.add() that Allows Arbitrary Director
CVE-2026-41233 5.4 MEDIUM Froxlor has a Reseller Domain Quota Bypass via Unvalidated adminid Parameter in Domains.ad
CVE-2026-41232 5.0 MEDIUM Froxlor has an Email Sender Alias Domain Ownership Bypass via Wrong Array Index that Allow

IV. Related Vulnerabilities

Same product: froxlor
Same vendor: froxlor
Same weakness: CWE-98

V. Comments for CVE-2026-41228

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