CVE-2026-41232

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.

• CWE-863

• https://github.com/froxlor/froxlor/commit/77d04badf549d5f8429828f0fbc69bc37a35e07aPatch
• https://github.com/froxlor/froxlor/releases/tag/2.3.6Release Notes
• https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6Exploit, Mitigation, Vendor Advisory
• https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6Exploit, Mitigation, Vendor Advisory

Published

Apr 23, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

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