CrushFTP Unprotected Alternate Channel Vulnerability
CrushFTP — CrushFTP
CrushFTP 10 before 10.8.5 and 11 before 11.3.4_23, when the DMZ proxy feature is not used, mishandles AS2 validation and consequently allows remote attackers to obtain admin access via HTTPS, as exploited in the wild in July 2025.
9.0
92.0%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- Published
- Jul 18, 2025
- Modified
- Oct 21, 2025
- Added to KEV
- Jul 22, 2025
- Federal patch due
- Aug 12, 2025
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2025-54309, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2025-54309 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2025-54309?
CrushFTP 10 before 10.8.5 and 11 before 11.3.4_23, when the DMZ proxy feature is not used, mishandles AS2 validation and consequently allows remote attackers to obtain admin access via HTTPS, as exploited in the wild in July 2025.
How severe is CVE-2025-54309?
CVE-2025-54309 has a CVSS base score of 9.0 out of 10 (CVSS 3.1).
Is CVE-2025-54309 actively exploited in the wild?
Yes. CVE-2025-54309 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jul 22, 2025, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2025-54309?
92.0% - meaning FIRST.org's EPSS model estimates a 92.0% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
What type of vulnerability is CVE-2025-54309?
CVE-2025-54309 is classified under CWE-420 (CWE-420 Unprotected Alternate Channel).
Cross-checked against
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