Vulnerability in Crushftp
CVE-2025-54309
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.
EPSS: 0.768 (99.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Crushftp — versions 10, 11
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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.
Public proof-of-concept exploits
- watchtowrlabs/watchTowr-vs-CrushFTP-Authentication-Bypass-CVE-2025-54309
- foregenix/CVE-2025-54309
- 0xLittleSpidy/CVE-2025-54309
- Smileyface101/CrushFTP-AS2-Bypass-Research-CVE-2025-54309
- chin-tech/CrushFTP_CVE-2025-54309
- whisperer1290/CVE-2025-54309__Enhanced_exploit
- fuckyourheroes/CVE-2025-54309
- blueisbeautiful/CVE-2025-54309
- PuddinCat/GithubRepoSpider
- a1batr0ssG/VulhubExpand
References
- www.crushftp.com/crush11wiki/Wiki.jsp
- www.rapid7.com/blog/post/crushftp-zero-day-exploited-in-the-wild/
- www.bleepingcomputer.com/news/security/crushftp-zero-day-exploited-in-attacks-t…
- www.vicarius.io/vsociety/posts/cve-2025-54309-detect-crushftp-vulnerability
- www.vicarius.io/vsociety/posts/cve-2025-54309-mitigate-crushftp-vulnerability
Frequently asked questions
- What is CVE-2025-54309?
- CVE-2025-54309 is a critical-severity vulnerability in Crushftp, classified under Unprotected Alternate Channel. CVSS score: 9.0/10. Published 2025-07-18.
- How severe is CVE-2025-54309?
- Critical severity. CVSS v3 base score is 9.0 out of 10.
- Is CVE-2025-54309 known to be exploited?
- Yes. CVE-2025-54309 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-07-22), indicating it is being actively exploited. 21 public proof-of-concept repositories are indexed.