CVE-2026-41232 Froxlor has an Email Sender Alias Domain Ownership Bypass via Wrong Array Index Allows Cross-Customer Email Spoofing
Authenticated users can spoof email addresses from other customers due to a domain ownership validation bypass in Froxlor.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-41232?
CVE-2026-41232 is a medium-severity missing authorization vulnerability in froxlor, published on 23 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-863
Which versions are affected by CVE-2026-41232?
2 open source packages ship an affected version, including froxlor/froxlor. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
froxlor/froxlor Packagist | All versions | 2.3.6 |
froxlor/froxlor Packagist | All versions | 2.3.6 |
Products include Froxlor Froxlor.
How do I fix CVE-2026-41232?
Upgrade froxlor/froxlor to 2.3.6 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-41232 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41232 exists.
Other vulnerabilities in froxlor
- CVE-2026-41228 Froxlor has Local File Inclusion via path traversal in API `def_language` parameter that leads to Remote Code Execution
- CVE-2023-6069 Improper Link Resolution Before File Access in froxlor/froxlor
- CVE-2023-0671 Code Injection in froxlor/froxlor
- CVE-2023-3173 Improper Restriction of Excessive Authentication Attempts in froxlor/froxlor
- CVE-2023-1307 Authentication Bypass by Primary Weakness in froxlor/froxlor
Sources
Also known as GHSA-vmjj-qr7v-pxm6.