CVE-2026-41228

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 v3 9.9 CRITICAL

9.9^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/froxlor/froxlor/commit/bc5e6dbaa90e6f3573129da640595e8c770e1d0c	Patch
https://github.com/froxlor/froxlor/releases/tag/2.3.6	Release Notes
https://github.com/froxlor/froxlor/security/advisories/GHSA-w59f-67xm-rxx7	Exploit Mitigation Vendor Advisory
https://github.com/froxlor/froxlor/security/advisories/GHSA-w59f-67xm-rxx7	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:froxlor:froxlor:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-23 04:16

Updated : 2026-06-17 10:46

NVD link : CVE-2026-41228

Mitre link : CVE-2026-41228

CVE.ORG link : CVE-2026-41228

JSON object : View

Products Affected

froxlor

froxlor

CWE

CWE-98

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')

{"id": "CVE-2026-41228", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-41228", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-04-23T14:46:42.002368Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.9, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 3.1}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "froxlor", "product": "froxlor", "versions": [{"status": "affected", "version": "< 2.3.6"}]}]}], "published": "2026-04-23T04:16:19.193", "references": [{"url": "https://github.com/froxlor/froxlor/commit/bc5e6dbaa90e6f3573129da640595e8c770e1d0c", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/froxlor/froxlor/releases/tag/2.3.6", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/froxlor/froxlor/security/advisories/GHSA-w59f-67xm-rxx7", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/froxlor/froxlor/security/advisories/GHSA-w59f-67xm-rxx7", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-98"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-06-17T10:46:20.857", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:froxlor:froxlor:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9A9C896A-1305-4134-850E-4B44962A6C0A", "versionEndExcluding": "2.3.6"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}