Intelligence online17 sources monitored8 actively exploited 7d26 published 24hChecked recently
Vulnerability record

CVE-2025-54309

CrushFTP Unprotected Alternate Channel Vulnerability

CriticalExploitation confirmedCISA KEV
What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run CrushFTP, fix it now.

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.

US federal civilian agencies must remediate by Aug 12, 2025.

Patch status

No official fix confirmed yet

Until a fix ships, follow the vendor's mitigations and CISA's required action, limit exposure of affected systems, and watch this record for a patch.

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.

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Affected products

ProductVendorAffected versionsFixed inSource
CrushFTPCrushFTP>= 10.0.0, < 10.8.5; >= 11.0.0, < 11.3.4_2310.8.5; 11.3.4_23KEV

Sources: KEV = CISA Known Exploited Vulnerabilities catalog.

Intelligence timeline

Developments from the last 30 days, newest first.

  1. CVSS scoredUpdateKEV

    CVE-2025-54309 scored CVSS 9.8: CrushFTP CrushFTP, CrushFTP Unprotected Alternate Channel Vulnerability

    CISA lists this as exploited in the wild. Unpatched CrushFTP systems are exposed to active attacks now.

    Basis: NIST National Vulnerability Database

1 earlier event is available with a subscription. See plans.

Coverage

We have not published a story about this vulnerability yet.

References

  • crushftp.com https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CompromiseJuly2025
  • nvd.nist.gov https://nvd.nist.gov/vuln/detail/CVE-2025-54309
  • bleepingcomputer.com https://www.bleepingcomputer.com/news/security/crushftp-zero-day-exploited-in-attacks-to-gain-admin-access-on-…
  • rapid7.com https://www.rapid7.com/blog/post/crushftp-zero-day-exploited-in-the-wild/
  • vicarius.io https://www.vicarius.io/vsociety/posts/cve-2025-54309-detect-crushftp-vulnerability
  • vicarius.io https://www.vicarius.io/vsociety/posts/cve-2025-54309-mitigate-crushftp-vulnerability
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-54309