CVE-2025-54309: CrushFTP Unprotected Alternate Channel Vulnerability
Critical · CVSS 9.0 (CVSS 3.1)KEV known exploitedEPSS 93.5%, 100th percentilePublished Updated Assigner: mitre
In CISA’s Known Exploited Vulnerabilities catalog: CrushFTP Unprotected Alternate Channel Vulnerability.
Added , federal remediation due . Known ransomware use: Unknown.
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.
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.
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H · CWE-420
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
CrushFTP: CrushFTP
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- www.bleepingcomputer.com/news/security/crushftp-zero-day-exploited-in-attacks-to-gain-admin-ac… (opens in new tab)
- www.crushftp.com/crush11wiki/Wiki.jsp (opens in new tab)
- www.rapid7.com/blog/post/crushftp-zero-day-exploited-in-the-wild/ (opens in new tab)
- www.vicarius.io/vsociety/posts/cve-2025-54309-detect-crushftp-vulnerability (opens in new tab)
- www.vicarius.io/vsociety/posts/cve-2025-54309-mitigate-crushftp-vulnerability (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)