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Vulnerability details: VCID-vvvf-273x-s3g8
Vulnerability ID VCID-vvvf-273x-s3g8
Aliases CVE-2026-41235
GHSA-gcv3-5v9q-fmhh
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-863 Incorrect Authorization
System Score Found at
epss 0.00043 https://api.first.org/data/v1/epss?cve=CVE-2026-41235
epss 0.00043 https://api.first.org/data/v1/epss?cve=CVE-2026-41235
epss 0.00043 https://api.first.org/data/v1/epss?cve=CVE-2026-41235
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-gcv3-5v9q-fmhh
cvssv3.1 8.8 https://github.com/froxlor/froxlor
cvssv4 8.6 https://github.com/froxlor/froxlor
generic_textual HIGH https://github.com/froxlor/froxlor
cvssv3.1 8.8 https://github.com/froxlor/froxlor/releases/tag/2.3.7
cvssv4 8.6 https://github.com/froxlor/froxlor/releases/tag/2.3.7
generic_textual HIGH https://github.com/froxlor/froxlor/releases/tag/2.3.7
ssvc Track* https://github.com/froxlor/froxlor/releases/tag/2.3.7
cvssv3.1 8.8 https://github.com/froxlor/froxlor/security/advisories/GHSA-gcv3-5v9q-fmhh
cvssv3.1_qr HIGH https://github.com/froxlor/froxlor/security/advisories/GHSA-gcv3-5v9q-fmhh
cvssv4 8.6 https://github.com/froxlor/froxlor/security/advisories/GHSA-gcv3-5v9q-fmhh
generic_textual HIGH https://github.com/froxlor/froxlor/security/advisories/GHSA-gcv3-5v9q-fmhh
ssvc Track* https://github.com/froxlor/froxlor/security/advisories/GHSA-gcv3-5v9q-fmhh
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2026-41235
cvssv4 8.6 https://nvd.nist.gov/vuln/detail/CVE-2026-41235
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2026-41235
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-41235
https://github.com/froxlor/froxlor
2.3.7 https://github.com/froxlor/froxlor/releases/tag/2.3.7
CVE-2026-41235 https://nvd.nist.gov/vuln/detail/CVE-2026-41235
GHSA-gcv3-5v9q-fmhh https://github.com/advisories/GHSA-gcv3-5v9q-fmhh
GHSA-gcv3-5v9q-fmhh https://github.com/froxlor/froxlor/security/advisories/GHSA-gcv3-5v9q-fmhh
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/froxlor/froxlor
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: 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 Found at https://github.com/froxlor/froxlor
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/froxlor/froxlor/releases/tag/2.3.7
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: 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 Found at https://github.com/froxlor/froxlor/releases/tag/2.3.7
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2026-06-08T18:29:06Z/ Found at https://github.com/froxlor/froxlor/releases/tag/2.3.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/froxlor/froxlor/security/advisories/GHSA-gcv3-5v9q-fmhh
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: 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 Found at https://github.com/froxlor/froxlor/security/advisories/GHSA-gcv3-5v9q-fmhh
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2026-06-08T18:29:06Z/ Found at https://github.com/froxlor/froxlor/security/advisories/GHSA-gcv3-5v9q-fmhh
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2026-41235
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: 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 Found at https://nvd.nist.gov/vuln/detail/CVE-2026-41235
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.13602
EPSS Score 0.00043
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:51:14.468349+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/41xxx/CVE-2026-41235.json 38.6.0