CVE-2025-54309

CrushFTP: Unprotected Alternate Channel

As of , CVE-2025-54309 in CrushFTP is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.

Exploited
Yes: CISA listed it on 22 July 2025
US federal deadline
12 August 202521 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.95Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
Public exploit
None foundNeither Metasploit nor Exploit-DB lists one.
Fix
Vendor advice: www.crushftp.comLinks below, from CISA's entry.

What CISA says 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's required action

What the flaw is

CrushFTP contains an unprotected alternate channel vulnerability. When the DMZ proxy feature is not used, mishandles AS2 validation and consequently allows remote attackers to obtain admin access via HTTPS.

CISA's 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.

The CVE record's description, from mitre

CVE published
18 July 2025
Assigned by
mitre
CVSS
9.0 Critical (CVSS 3.1, from the CNA)
CWE-420
Unprotected Alternate Channel
CISA SSVC, exploitation
active
CISA SSVC, automatable
no
CISA SSVC, technical impact
total

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.

CrushFTP: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2024-4040VFS Sandbox EscapeCrushFTP CrushFTPPatch this weekMetasploit module; EPSS 0.990.99
CVE-2025-31161Authentication BypassCrushFTP CrushFTPPatch this weekRansomware use; EPSS 0.990.99

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