CVE-2025-54309

Known Exploited

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.

Category

9.0
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.10%
KEV Since 
Third-Party Advisory crushftp.com
Affected: CrushFTP CrushFTP
Published at:
Updated at:

References

Link Tags
https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CompromiseJuly2025 third party advisory
https://www.rapid7.com/blog/post/crushftp-zero-day-exploited-in-the-wild/ press/media coverage
https://www.bleepingcomputer.com/news/security/crushftp-zero-day-exploited-in-attacks-to-gain-admin-access-on-servers/ press/media coverage

Frequently Asked Questions

What is the severity of CVE-2025-54309?
CVE-2025-54309 has been scored as a critical severity vulnerability.
How to fix CVE-2025-54309?
To fix CVE-2025-54309, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-54309 being actively exploited in the wild?
It is confirmed that CVE-2025-54309 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-54309?
CVE-2025-54309 affects CrushFTP CrushFTP.
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