RCE in Froxlor
CVE-2026-41229
Froxlor is open source server administration software. Prior to version 2.3.6, `PhpHelper::parseArrayToString()` writes string values into single-quoted PHP string literals without escaping single quotes. When an admin with `change_serversettings` permission adds or updates a MySQL server via the API, the `privileged_user` parameter (which has no input validation) is written unescaped into `lib/userdata.inc.php`. Since this file is `require`d on every request via `Database::getDB()`, an attacker can inject arbitrary PHP code that executes as the web server user on every subsequent page load. Version 2.3.6 contains a patch.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (50.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.002
Affected products
- Froxlor — versions < 2.3.6
Weakness classification (CWE)
References
- github.com/froxlor/froxlor/security/advisories/GHSA-gc9w-cc93-rjv8 (Exploit, Mitigation, Vendor Advisory)
- github.com/froxlor/froxlor/commit/3589ddf93ab59eb2a8971f0f56cbf6266d03c4ae (Patch)
- github.com/froxlor/froxlor/releases/tag/2.3.6 (Release Notes)
Frequently asked questions
- What is CVE-2026-41229?
- CVE-2026-41229 is a critical-severity vulnerability in Froxlor, classified under Code Injection. CVSS score: 9.1/10. Published 2026-04-23.
- How severe is CVE-2026-41229?
- Critical severity. CVSS v3 base score is 9.1 out of 10.