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CVE-2026-41232— Froxlor has an Email Sender Alias Domain Ownership Bypass via Wrong Array Index that Allows Cross-Customer Email Spoofing

Quick assessment

Affected
froxlor froxlor
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Froxlor是Froxlor团队的一套轻量级服务器管理软件。 Froxlor 2.3.6之前版本存在安全漏洞，该漏洞源于EmailSender::add()中域所有权验证使用了错误的数组索引，导致任何经过身份验证的客户可以为其他客户的域添加发件人别名。

CVSS 5.0 · Medium EPSS 0.34% · P25

Possible ATT&CK Techniques 1 AI

T1528 · Steal Application Access Token
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I. Basic Information for CVE-2026-41232

Vulnerability Information
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Vulnerability Title
Froxlor has an Email Sender Alias Domain Ownership Bypass via Wrong Array Index that Allows Cross-Customer Email Spoofing
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Froxlor 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Froxlor是Froxlor团队的一套轻量级服务器管理软件。 Froxlor 2.3.6之前版本存在安全漏洞，该漏洞源于EmailSender::add()中域所有权验证使用了错误的数组索引，导致任何经过身份验证的客户可以为其他客户的域添加发件人别名。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
froxlor froxlor < 2.3.6 -

II. Public POCs for CVE-2026-41232

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III. Intelligence Information for CVE-2026-41232

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Vendor Advisories for CVE-2026-41232 (1)

Same Patch Batch · froxlor · 2026-04-23 · 6 CVEs total

CVE-2026-41228 10.0 CRITICAL Froxlor has Local File Inclusion via path traversal in API `def_language` parameter that l
CVE-2026-41229 9.1 CRITICAL Froxlor has a PHP Code Injection via Unescaped Single Quotes in userdata.inc.php Generatio
CVE-2026-41230 8.5 HIGH Froxlor has a BIND Zone File Injection via Unsanitized DNS Record Content in DomainZones::
CVE-2026-41231 7.5 HIGH Froxlor has Incomplete Symlink Validation in DataDump.add() that Allows Arbitrary Director
CVE-2026-41233 5.4 MEDIUM Froxlor has a Reseller Domain Quota Bypass via Unvalidated adminid Parameter in Domains.ad

IV. Related Vulnerabilities

Same product: froxlor
Same vendor: froxlor
Same weakness: CWE-863

V. Comments for CVE-2026-41232

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