CVE-2025-54309

CrushFTP Unprotected Alternate Channel Vulnerability

Critical 9.0
Exploited: added to CISA KEV 22 Jul 2025

Description

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.

Key facts

Published: 18 Jul 2025
Last changed: 21 Oct 2025
Assigned by: mitre
KEV added: 22 Jul 2025
KEV fix due: 12 Aug 2025
EPSS: 93.473% likely to be exploited in the next 30 days, higher than 99.842% of CVEs (scores for 15 Nov 2026)
SSVC (CISA): Exploitation: active; Automatable: no; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

9.0CVSS 3.1, Criticalfrom the CNA (mitre)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

What to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
CrushFTP	CrushFTP	Default status: unaffected 10 up to but excluding 10.8.5 (affected) 11 up to but excluding 11.3.4_23 (affected)