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Vulnerability Details :

CVE-2026-41232

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-23 Apr, 2026 | 03:54
Updated At-23 Apr, 2026 | 14:50
Rejected At-
Credits

Froxlor has an Email Sender Alias Domain Ownership Bypass via Wrong Array Index that Allows Cross-Customer Email Spoofing

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:23 Apr, 2026 | 03:54
Updated At:23 Apr, 2026 | 14:50
Rejected At:
â–¼CVE Numbering Authority (CNA)
Froxlor has an Email Sender Alias Domain Ownership Bypass via Wrong Array Index that Allows Cross-Customer Email Spoofing

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
Vendor
froxlor
Product
froxlor
Versions
Affected
  • < 2.3.6
Problem Types
TypeCWE IDDescription
CWECWE-863CWE-863: Incorrect Authorization
Type: CWE
CWE ID: CWE-863
Description: CWE-863: Incorrect Authorization
Metrics
VersionBase scoreBase severityVector
3.15.0MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
Version: 3.1
Base score: 5.0
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6
x_refsource_CONFIRM
https://github.com/froxlor/froxlor/commit/77d04badf549d5f8429828f0fbc69bc37a35e07a
x_refsource_MISC
https://github.com/froxlor/froxlor/releases/tag/2.3.6
x_refsource_MISC
Hyperlink: https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/froxlor/froxlor/commit/77d04badf549d5f8429828f0fbc69bc37a35e07a
Resource:
x_refsource_MISC
Hyperlink: https://github.com/froxlor/froxlor/releases/tag/2.3.6
Resource:
x_refsource_MISC
â–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6
exploit
Hyperlink: https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6
Resource:
exploit
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:23 Apr, 2026 | 05:16
Updated At:27 Apr, 2026 | 17:02

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.0MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 5.0
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
CPE Matches

froxlor
froxlor
>>froxlor>>Versions before 2.3.6(exclusive)
cpe:2.3:a:froxlor:froxlor:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-863Secondarysecurity-advisories@github.com
CWE ID: CWE-863
Type: Secondary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/froxlor/froxlor/commit/77d04badf549d5f8429828f0fbc69bc37a35e07asecurity-advisories@github.com
Patch
https://github.com/froxlor/froxlor/releases/tag/2.3.6security-advisories@github.com
Release Notes
https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6security-advisories@github.com
Exploit
Vendor Advisory
Mitigation
https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit
Vendor Advisory
Mitigation
Hyperlink: https://github.com/froxlor/froxlor/commit/77d04badf549d5f8429828f0fbc69bc37a35e07a
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/froxlor/froxlor/releases/tag/2.3.6
Source: security-advisories@github.com
Resource:
Release Notes
Hyperlink: https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6
Source: security-advisories@github.com
Resource:
Exploit
Vendor Advisory
Mitigation
Hyperlink: https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
Exploit
Vendor Advisory
Mitigation

Change History

0
Information is not available yet

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Action-Not Available
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CWE ID-CWE-863
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Updated-28 Apr, 2026 | 18:45
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Known To Be Used In Ransomware Campaigns?-Not Available
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KEV Action Due Date-Not Available
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Matching Score-4
Assigner-Cisco Systems, Inc.
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Assigner-Cisco Systems, Inc.
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7 Day CHG~0.00%
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Known To Be Used In Ransomware Campaigns?-Not Available
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Known KEV||Action Due Date - 2023-10-04||Apply mitigations per vendor instructions for group-lock and vpn-simultaneous-logins or discontinue use of the product for unsupported devices.

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Action-Not Available
Vendor-Cisco Systems, Inc.
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Authentication Bypass Using an Alternate Path or Channel
CWE ID-CWE-863
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Matching Score-4
Assigner-GitLab Inc.
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Matching Score-4
Assigner-GitLab Inc.
CVSS Score-5||MEDIUM
EPSS-0.17% / 37.02%
||
7 Day CHG~0.00%
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Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

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Action-Not Available
Vendor-GitLab Inc.
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CWE ID-CWE-863
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Details not found