CVE-2026-41228
Froxlor has Local File Inclusion via path traversal in API `def_language` parameter that leads to Remote Code Execution
CRITICAL 9.9EPSS 0.7%
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.
- Affected
- froxlor
- CVSS v3.1 GITHUB
- 9.9 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - EPSS
- 0.75% chance of exploitation in the next 30 days, 54th percentile
- Published
- 2026-04-23
Proof-of-concept exploits (1)
Security advisories
- froxlor/froxlor/security/advisories/GHSA-w59f-67xm-rxx7
- froxlor/froxlor/commit/bc5e6dbaa90e6f3573129da640595e8c770e1d0c