medium5.0
CVE-2026-41232
Froxlor has an Email Sender Alias Domain Ownership Bypass via Wrong Array Index Allows Cross-Customer Email Spoofing
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | froxlor/froxlor | < 2.3.6 | 2.3.6 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Froxlor | Froxlor | before 2.3.6 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-vmjj-qr7v-pxm6
- https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6
- https://nvd.nist.gov/vuln/detail/CVE-2026-41232
- https://github.com/froxlor/froxlor/commit/77d04badf549d5f8429828f0fbc69bc37a35e07a
- https://github.com/froxlor/froxlor/releases/tag/2.3.6