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Vulnerabilities

Vulnerability · CVE-2025-54309

CrushFTP Unprotected Alternate Channel Vulnerability

Published Jul 18, 2025 · catalog updated Jun 17, 2026 · CrushFTP CrushFTP

Patch now

CVE-2025-54309 is in the CISA known-exploited catalog, due Aug 12, 2025. Confirm CrushFTP CrushFTP against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
95.11%
Remediation
Remediation guidance
Affected products
cpe crushftp/crushftp · vendor CrushFTP CrushFTP

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. Initial-access exploit intelligence.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe crushftp/crushftpversion unspecified
  • vendor CrushFTP CrushFTPversion unspecified

How to fix CVE-2025-54309

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-54309 is in the CISA known-exploited catalog, due Aug 12, 2025. Confirm CrushFTP CrushFTP against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-420. EPSS 95.11%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 18, 2025 · Catalog

    Detected

    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.

  2. Jul 22, 2025 · CISA KEV

    Known exploited

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

  3. Aug 12, 2025 · CISA KEV

    Remediation due

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

  4. Jun 17, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2025-54309

    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.gov
  • CVE.orgVulnerability recordCVE-2025-54309

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-54309

    30-day exploitation probability 95.1%

    first.org
  • NIST NVDVulnerability recordCVE-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.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2025-54309

    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.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.