CVE-2025-54309

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 v3.1 Score

9.0

CRITICAL

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CISA Known Exploited Vulnerability

This vulnerability is actively exploited in the wild.

Added: Jul 22, 2025 Remediation due: Aug 12, 2025

Weakness Type (CWE)

CWE-420 CWE-420

Affected Products

Vendor	Product	Versions
crushftp	crushftp	10.0.0 — 10.8.5
crushftp	crushftp	11.0.0 — 11.3.4_23

References

Advisories & Patches

https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CompromiseJuly2025

Other References

https://www.bleepingcomputer.com/news/security/crushftp-zero-day-exploited-in-attacks-to-gain-admin-access-on-servers/ 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

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 9.0 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2025-54309? +

CVE-2025-54309 has a CVSS v3.1 score of 9.0 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-54309? +

CVE-2025-54309 affects products from crushftp, specifically: crushftp. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-54309? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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