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CVE-2026-41228

CRITICAL Exploitation: PoC
10.0
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-41228
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-04-18 03:47 UTC
Published
2026-04-23 03:41 UTC
Last updated
2026-04-23 14:48 UTC
Primary CWE
CWE-98
CWE-98: Improper Control of Filename for Include/Require Sta…
Vendor / Product
froxlor / froxlor
Sources
cve.org  ·  NVD

Severity & Metrics

10.0 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
no
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
froxlor froxlor — < 2.3.6
Weakness (CWE)
CWESourceDescription
CWE-98 cna CWE-98: Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
CVSS scores (1)
ScoreSeverityVersionSourceVector
10.0 CRITICAL 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
References (3)
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