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Vulnerability record · CVE-2026-41232 · published 23 April 2026

CVE-2026-41232: Froxlor incorrect authorization vulnerability

Froxlor · Froxlor

Froxlor is open source server administration software. Prior to version 2.3.6, in `EmailSender::add()`, the domain ownership validation for full email sender aliases uses the wrong array index when splitting the email address, passing the local part instead of the domain to `validateLocalDomainOwnership()`. This causes the ownership check to always pass for non-existent "domains," allowing any authenticated customer to add sender aliases for email addresses on domains belonging to other customers. Postfix's `sender_login_maps` then authorizes the attacker to send emails as those addresses. Version 2.3.6 fixes the issue.

5.0 CVSS 3.1 Medium EPSS 0.34% · top 75.5% CWE-863 · Incorrect authorization
5.0CVSS 3.1 base score
0.34%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Froxlor is open source server administration software. Prior to version 2.3.6, in `EmailSender::add()`, the domain ownership validation for full email sender aliases uses the wrong array index when splitting the email address, passing the local part instead of the domain to `validateLocalDomainOwnership()`. This causes the ownership check to always pass for non-existent "domains," allowing any authenticated customer to add sender aliases for email addresses on domains belonging to other customers. Postfix's `sender_login_maps` then authorizes the attacker to send emails as those addresses. Version 2.3.6 fixes the issue.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/froxlor/froxlor/commit/77d04badf549d5f8429828f0fbc69bc37a35e07a Patch
https://github.com/froxlor/froxlor/releases/tag/2.3.6 Release Notes
https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6 ExploitMitigationVendor Advisory
https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6 ExploitMitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2026-41228Froxlor php remote file inclusion vulnerabilityFroxlor is open source server administration software. Prior to version 2.3.6, the Froxlor API endpoint `Customers.update` (and `Admins.update`) does…EPSS 0.75%9.8CVE-2023-3173Froxlor improper restriction of authentication attempts vulnerabilityImproper Restriction of Excessive Authentication Attempts in GitHub repository froxlor/froxlor prior to 2.0.20.EPSS 1.1%9.8CVE-2023-1307Froxlor vulnerabilityAuthentication Bypass by Primary Weakness in GitHub repository froxlor/froxlor prior to 2.0.13.EPSS 1.1%9.8CVE-2021-42325Froxlor sql injection vulnerabilityFroxlor through 0.10.29.1 allows SQL injection in Database/Manager/DbManagerMySQL.php via a custom DB name.EPSS 12%9.8CVE-2015-5959Froxlor information exposure vulnerabilityFroxlor before 0.9.33.2 with the default configuration/setup might allow remote attackers to obtain the database password by reading /logs/sql-error.…EPSS 3.1%9.8CVE-2016-5100Froxlor vulnerabilityFroxlor before 0.9.35 uses the PHP rand function for random number generation, which makes it easier for remote attackers to guess the password reset…EPSS 1.9%9.1CVE-2026-41229Froxlor code injection vulnerabilityFroxlor is open source server administration software. Prior to version 2.3.6, `PhpHelper::parseArrayToString()` writes string values into single-quo…EPSS 0.69%9.1CVE-2026-26279Froxlor os command injection vulnerabilityFroxlor is open source server administration software. Prior to 2.3.4, a typo in Froxlor's input validation code (== instead of =) completely disable…EPSS 1.1%

Source: NIST National Vulnerability Database (record CVE-2026-41232), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.