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.
Affected products
froxlor: froxlor
References4
- github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-p… ExploitMitigationVendor Advisory
- github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-p… ExploitMitigationVendor Advisory
- github.com/froxlor/froxlor/commit/77d04badf549d5f8429828f0fbc69… Patch
- github.com/froxlor/froxlor/releases/tag/2.3.6 Release Notes
Metrics
- CVSS 3.1
-
5.0
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N - EPSS — exploit probability
- 0% percentile: 14 · as of 13 November 2026
- CWE
- CWE-863
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