CVE-2025-54309 — CrushFTP Unprotected Alternate Channel Vulnerability
CVE-2025-54309: CrushFTP Unprotected Alternate Channel Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | CrushFTP |
| Product | CrushFTP |
| Date added | 2025-07-22 |
| Due date | 2025-08-12 |
| Ransomware campaign use | Unknown |
Description
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.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CompromiseJuly2025 ; https://nvd.nist.gov/vuln/detail/CVE-2025-54309
Weakness behind it
CISA records this vulnerability as an instance of CWE-420. From there the chain continues into CAPEC attack patterns and ATT&CK techniques, all inside this corpus.
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-54309
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
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