CVE DATABASE / CVE-2025-54309
CVE-2025-54309
CrushFTP Unprotected Alternate Channel Vulnerability
Confirmed exploited in the wild. Added 2025-07-22.
Federal remediation due 2025-08-12.
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.
Summary
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.
CVSS 3.1 breakdown
| Base score | 9 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
| Attack vector | NETWORK |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | CHANGED |
| Confidentiality | HIGH |
| Integrity | HIGH |
| Availability | HIGH |
Weakness type (CWE)
Affected products
Use our free CVE Lookup tool for the latest NVD record, or browse the full CISA KEV catalog.
References
- https://www.bleepingcomputer.com/news/security/crushftp-zero-day-exploited-in-attacks-to-gain-admin-access-on-servers/
- https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CompromiseJuly2025
- https://www.rapid7.com/blog/post/crushftp-zero-day-exploited-in-the-wild/
- https://www.vicarius.io/vsociety/posts/cve-2025-54309-detect-crushftp-vulnerability
- https://www.vicarius.io/vsociety/posts/cve-2025-54309-mitigate-crushftp-vulnerability
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-54309
Data: NIST NVD + CISA KEV. NVD last modified 2025-11-05. Always verify against the vendor advisory before acting.