CVE-2025-54309
CrushFTP Unprotected Alternate Channel Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 12 August 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 94.71% probability · 100th percentile
- CISA KEV
- Listed 22 July 2025 · due 12 August 2025
- Weakness
- CWE-420
- Affected
- crushftp/crushftp
- Source
- cve@mitre.org
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CompromiseJuly2025 ; https://nvd.nist.gov/vuln/detail/CVE-2025-54309
References
- https://www.bleepingcomputer.com/news/security/crushftp-zero-day-exploited-in-attacks-to-gain-admin-access-on-servers/Press/Media Coverage
- https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CompromiseJuly2025Vendor Advisory
- https://www.rapid7.com/blog/post/crushftp-zero-day-exploited-in-the-wild/Press/Media Coverage
- https://www.vicarius.io/vsociety/posts/cve-2025-54309-detect-crushftp-vulnerabilityThird Party Advisory
- https://www.vicarius.io/vsociety/posts/cve-2025-54309-mitigate-crushftp-vulnerabilityThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-54309US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.