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TI-2026-29844 Aliases CVE-2026-41235GHSA-gcv3-5v9q-fmhh

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

Priority HIGH 72CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00228 13th percentileScored 2026-11-07
Fix Fixed froxlor/froxlor (Packagist): 2.3.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
froxlorfroxlor= 2.3.6—No fix listedCNA
—froxlor/froxlor (Packagist)2.3.6 to before 2.3.72.3.7Patch availableGHSA-gcv3-5v9q-fmhh
  • froxlor Vendorfroxlor Affected = 2.3.6 Fixed in — No fix listed CNA
  • froxlor/froxlor (Packagist) Vendor— Affected 2.3.6 to before 2.3.7 Fixed in 2.3.7 Patch available GHSA-gcv3-5v9q-fmhh

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:froxlor:froxlor:*:*:*:*:*:*:*:*——froxlor
  • cpe:2.3:a:froxlor:froxlor:*:*:*:*:*:*:*:* Versions — — ·froxlor

Remediation

  • Fix · GHSA-gcv3-5v9q-fmhh froxlor/froxlor (Packagist) Fixed in 2.3.7 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-41235
  2. 2026-10-03 Alias added: GHSA-gcv3-5v9q-fmhh

References

Advisory 1

Other 3

  • TI-2023-00300 Command Injection in froxlor/froxlor CVSS 3.1HIGH 8.8
  • TI-2023-02973 Improper Restriction of Excessive Authentication Attempts in froxlor/froxlor CVSS 3.1CRITICAL 9.8
  • TI-2023-01234 Authentication Bypass by Primary Weakness in froxlor/froxlor CVSS 3.1CRITICAL 9.8
  • TI-2023-01911 Unrestricted Upload of File with Dangerous Type in froxlor/froxlor CVSS 3.1HIGH 8.8
  • TI-2026-64867 froxlor before 2.3.12 Authentication Bypass via Session Persistence CVSS 4.0HIGH 8.7
  • TI-2026-76945 Symlink following in Froxlor enables root privilege escalation CVSS 4.0CRITICAL 9.4
See all 86 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences