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CVE-2026-41235— Froxlor has an authorization bypass in FTP shell assignment via missing server-side `available_shells` enforcement

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版本存在安全漏洞，该漏洞源于FTP账户处理程序未强制执行shell白名单，可能导致任意shell访问。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.36% · P28

Affected Version Matrix 1

VendorProduct Version RangeStatus
froxlor froxlor = 2.3.6 affected
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I. Basic Information for CVE-2026-41235

Vulnerability Information
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Vulnerability Title
Froxlor has an authorization bypass in FTP shell assignment via missing server-side `available_shells` enforcement
Source: CVE Program / CVE List V5
Vulnerability Description
Froxlor is open source server administration software. Version 2.3.6 lets administrators configure `system.available_shells` as the approved shell list that customers may assign to FTP users. However, the server-side FTP account handlers do not enforce that whitelist when processing add or edit requests. As a result, an authenticated customer with shell delegation enabled can submit an arbitrary shell such as `/bin/bash` even when the panel UI only offers more restricted choices. In deployments that use the default `nssextrausers` integration, the attacker-controlled shell is then propagated into the system account database, leading to real host shell access. Version 2.3.7 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
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版本存在安全漏洞，该漏洞源于FTP账户处理程序未强制执行shell白名单，可能导致任意shell访问。
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-2026-41235

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III. Intelligence Information for CVE-2026-41235

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Vendor Advisories for CVE-2026-41235 (1)

Vendor Pages for CVE-2026-41235 (1)

Same Patch Batch · froxlor · 2026-06-04 · 4 CVEs total

CVE-2026-41236 8.8 HIGH Froxlor has privilege escalation in SSH key synchronization via symlinked `authorized_keys
CVE-2026-41234 7.6 HIGH Froxlor: BIND Zone File Injection via TXT Record Content
CVE-2026-41237 Froxlor has an incomplete fix for CVE-2026-30932

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-41235

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