CVE-2026-41232 json
Froxlor has an Email Sender Alias Domain Ownership Bypass via Wrong Array Index that Allows Cross-Customer Email Spoofing
published 2026-04-16 6 mo ago modified 2026-06-17 4 mo ago also GHSA-vmjj-qr7v-pxm6 , EUVD-2026-25186
- cvss
- 5.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 13%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist froxlor/froxlor 2.3.6
- froxlor froxlor 2.3.6
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.0 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N |
| GitHub | 3.1 | 5.0 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | froxlor/froxlor | <2.3.6 |
2.3.6 |
Affected products
- froxlor froxlor
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/froxlor/froxlor/commit/77d04badf549d5f8429828f0fbc69bc37a35e07a
web, patch
-
github.com
/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6
exploit, web, mitigation, vendor-advisory
-
github.com
/froxlor/froxlor/releases/tag/2.3.6
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-41232
advisory
-
github.com
/froxlor/froxlor
package
Sources
- CVE List CVE-2026-41232
- GitHub Advisory GHSA-vmjj-qr7v-pxm6
- NVD CVE-2026-41232
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