CVE-2026-41232 Details
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.
A vulnerability in Froxlor's email sender alias management allows cross-customer email spoofing. Prior to version 2.3.6, the domain ownership validation in the 'EmailSender::add()' function incorrectly used the local part of the email address instead of the domain when checking ownership. This flaw enabled authenticated customers to add sender aliases for email addresses on domains owned by other customers. As a result, Postfix's 'sender_login_maps' authorized the spoofing of those addresses. Version 2.3.6 addresses this issue.
Users can update to Froxlor version 2.3.6, which includes the necessary fix. Instructions for downloading this version are available on the Froxlor GitHub Releases page.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 23, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6 | CISA-ADP | ExploitMitigationVendor Advisory |
| https://github.com/froxlor/froxlor/commit/77d04badf549d5f8429828f0fbc69bc37a35e07a | [email protected] | Patch |
| https://github.com/froxlor/froxlor/releases/tag/2.3.6 | [email protected] | Release Notes |
| https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6 | [email protected] | ExploitMitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-863 | Incorrect Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| froxlor froxlor | < 2.3.6 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 27, 2026 | Initial Analysis | [email protected] |
| Apr 23, 2026 | CVE Modified | CISA-ADP |
| Apr 23, 2026 | New CVE Received | [email protected] |