CVE-2026-41232

publishedCWE-863

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.

Technical severity5.0 mediumCVSS 3.1 · NVD: [email protected]

Published2026-04-23Source updated 2026-11-11

Collected2026-11-122 attributed sources

Fixes and workarounds

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: [email protected]

Fix

froxlor/froxlor (Packagist): OSV reports a fixed version 2.3.6. Check the advisory for supported release branches.

Source: OSV GHSA-vmjj-qr7v-pxm6

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
froxlor froxlor	< 2.3.6 (affected, custom)	NVD
froxlor/froxlor `froxlor/froxlor` Packagist	0.10.0 (affected, Packagist) 0.10.0-rc1 (affected, Packagist) 0.10.0-rc2 (affected, Packagist) 0.10.1 (affected, Packagist) 0.10.10 (affected, Packagist) 0.10.11 (affected, Packagist) 0.10.12 (affected, Packagist) 0.10.13 (affected, Packagist) 0.10.14 (affected, Packagist) 0.10.15 (affected, Packagist) 0.10.16 (affected, Packagist) 0.10.17 (affected, Packagist) 0.10.18 (affected, Packagist) 0.10.19 (affected, Packagist) 0.10.2 (affected, Packagist) 0.10.20 (affected, Packagist) 0.10.21 (affected, Packagist) 0.10.22 (affected, Packagist) 0.10.23 (affected, Packagist) 0.10.23.1 (affected, Packagist) 0.10.24 (affected, Packagist) 0.10.25 (affected, Packagist) 0.10.26 (affected, Packagist) 0.10.27 (affected, Packagist) 0.10.28 (affected, Packagist) 0.10.29 (affected, Packagist) 0.10.29.1 (affected, Packagist) 0.10.3 (affected, Packagist) 0.10.30 (affected, Packagist) 0.10.31 (affected, Packagist) 0.10.32 (affected, Packagist) 0.10.33 (affected, Packagist) 0.10.34 (affected, Packagist) 0.10.34.1 (affected, Packagist) 0.10.35 (affected, Packagist) 0.10.35.1 (affected, Packagist) 0.10.36 (affected, Packagist) 0.10.37 (affected, Packagist) 0.10.38 (affected, Packagist) 0.10.38.1 (affected, Packagist) 0.10.38.2 (affected, Packagist) 0.10.38.3 (affected, Packagist) 0.10.4 (affected, Packagist) 0.10.5 (affected, Packagist) 0.10.6 (affected, Packagist) 0.10.7 (affected, Packagist) 0.10.8 (affected, Packagist) 0.10.9 (affected, Packagist) 2.0.0 (affected, Packagist) 2.0.1 (affected, Packagist) 2.0.10 (affected, Packagist) 2.0.11 (affected, Packagist) 2.0.12 (affected, Packagist) 2.0.13 (affected, Packagist) 2.0.14 (affected, Packagist) 2.0.15 (affected, Packagist) 2.0.16 (affected, Packagist) 2.0.17 (affected, Packagist) 2.0.18 (affected, Packagist) 2.0.19 (affected, Packagist) 2.0.2 (affected, Packagist) 2.0.20 (affected, Packagist) 2.0.21 (affected, Packagist) 2.0.22 (affected, Packagist) 2.0.23 (affected, Packagist) 2.0.24 (affected, Packagist) 2.0.3 (affected, Packagist) 2.0.4 (affected, Packagist) 2.0.5 (affected, Packagist) 2.0.6 (affected, Packagist) 2.0.7 (affected, Packagist) 2.0.8 (affected, Packagist) 2.0.9 (affected, Packagist) 2.1.0 (affected, Packagist) 2.1.0-beta1 (affected, Packagist) 2.1.0-beta2 (affected, Packagist) 2.1.0-rc1 (affected, Packagist) 2.1.0-rc2 (affected, Packagist) 2.1.0-rc3 (affected, Packagist) 2.1.1 (affected, Packagist) 2.1.2 (affected, Packagist) 2.1.3 (affected, Packagist) 2.1.4 (affected, Packagist) 2.1.5 (affected, Packagist) 2.1.6 (affected, Packagist) 2.1.7 (affected, Packagist) 2.1.8 (affected, Packagist) 2.1.9 (affected, Packagist) 2.2.0 (affected, Packagist) 2.2.0-rc1 (affected, Packagist) 2.2.0-rc2 (affected, Packagist) 2.2.0-rc3 (affected, Packagist) 2.2.1 (affected, Packagist) 2.2.2 (affected, Packagist) 2.2.3 (affected, Packagist) 2.2.4 (affected, Packagist) 2.2.5 (affected, Packagist) 2.2.6 (affected, Packagist) 2.2.7 (affected, Packagist) 2.2.8 (affected, Packagist) 2.3.0 (affected, Packagist) 2.3.0-rc1 (affected, Packagist) 2.3.1 (affected, Packagist) 2.3.2 (affected, Packagist) 2.3.3 (affected, Packagist) 2.3.4 (affected, Packagist) 2.3.5 (affected, Packagist) Ecosystem version events: introduced 0; fixed 2.3.6 Source events (ECOSYSTEM) `[ { "introduced": "0" }, { "fixed": "2.3.6" } ]` Other versions: unaffected	OSV GHSA-vmjj-qr7v-pxm6

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

NVD applicability configurations (1)

These expressions retain AND/OR operators, negation, and required environmental products. A listed product is not sufficient to establish exposure when additional conditions apply.

[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:froxlor:froxlor:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "2.3.6",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 5.0 medium	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N`	NVD: [email protected]

Exploit evidence

https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6
exploit · [email protected]
https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6
exploit · 134c704f-9b21-4f2e-91b3-4a467353bcc0

References

https://github.com/froxlor/froxlor/commit/77d04badf549d5f8429828f0fbc69bc37a35e07a[email protected] · Patch
https://github.com/froxlor/froxlor/releases/tag/2.3.6[email protected] · Release Notes
https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6[email protected] · Exploit, Mitigation, Vendor Advisory
https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6134c704f-9b21-4f2e-91b3-4a467353bcc0 · Exploit, Mitigation, Vendor Advisory
https://github.com/advisories/GHSA-vmjj-qr7v-pxm6OSV / GitHub Security Advisories · advisory
https://osv.dev/vulnerability/GHSA-vmjj-qr7v-pxm6OSV / GitHub Security Advisories · osv

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