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CVE-2026-41228

Froxlor file inclusion

9.9 CRITICALPublic exploitEPSS 0.75%
  1. Published23 Apr 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

Froxlor< 2.3.6

Remediation

Fixed in
Froxlor≥ 2.3.6

References

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Frequently asked

Is CVE-2026-41228 being actively exploited?

CVE-2026-41228 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.75%.

How severe is CVE-2026-41228?

CVE-2026-41228 has a CVSS 3.1 base score of 9.9, rated critical. EPSS estimates a 0.75% probability of exploitation.

Which products are affected by CVE-2026-41228?

Affected products include Froxlor.

How do I fix CVE-2026-41228?

Upgrade affected software to a fixed version, for example Froxlor 2.3.6 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-41228 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.