CVE-2025-54309Known exploitationNetwork attack vector

Unauthenticated admin access via mishandled AS2 validation

Published Jul 18, 2025 · Updated Oct 21, 2025

Authentication bypass in CrushFTP 10 before 10.8.5 and 11 before 11.3.4_23 allows remote attackers to obtain admin access via HTTPS. CrushFTP links the flaw to AS2 handling in its HTTP(S) path but has not disclosed the exact validation error or affected function. The attack requires a directly reachable server without the enterprise DMZ proxy and grants administrative control.

CVSS severity9.0
Critical
EPSS probability94.71%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authentication bypass in CrushFTP 10 before 10.8.5 and 11 before 11.3.4_23 allows remote attackers to obtain admin access via HTTPS. CrushFTP links the flaw to AS2 handling in its HTTP(S) path but has not disclosed the exact validation error or affected function. The attack requires a directly reachable server without the enterprise DMZ proxy and grants administrative control.

The record

CVE
CVE-2025-54309
Published
Jul 18, 2025
Updated
Oct 21, 2025
Vendor
CrushFTP
Product
CrushFTP
Classifications
CWE-420, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 18, 2025Exploitation reportedCrushFTP July 2025 in-the-wild exploitation
  3. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10 <10.8.5
  2. Affected versionversion=11 <11.3.4_23

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CrushFTP · CrushFTPversion=10 <10.8.5; version=11 <11.3.4_23

Published CVSS scores

9.0NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-420Unprotected Alternate Channel
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo