VDB-316927 · CVE-2025-54309 · EUVD-2025-21909

CrushFTP up to 10.8.4/11.3.4_22 DMZ Proxy Feature unprotected alternate channel

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.8	$0-$5k	0.00

Summaryinfo

A vulnerability identified as critical has been detected in CrushFTP up to 10.8.4/11.3.4_22. The affected element is an unknown function of the component DMZ Proxy Feature. This manipulation causes unprotected alternate channel. This vulnerability is tracked as CVE-2025-54309. The attack is possible to be carried out remotely. Moreover, an exploit is present. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in CrushFTP up to 10.8.4/11.3.4_22. Affected by this vulnerability is some unknown functionality of the component DMZ Proxy Feature. The manipulation with an unknown input leads to a unprotected alternate channel vulnerability. The CWE definition for the vulnerability is CWE-420. The product protects a primary channel, but it does not use the same level of protection for an alternate channel. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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 is possible to read the advisory at crushftp.com. This vulnerability is known as CVE-2025-54309 since 07/18/2025. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but an exploit is available.

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 242340 (CrushFTP 10.x < 10.8.5 / 11.x < 11.3.4_23 Privilege Escalation (CVE-2025-54309)), which helps to determine the existence of the flaw in a target environment. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 07/22/2025 with a due date of 08/12/2025:

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Upgrading to version 10.8.5 or 11.3.4_23 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (242340), EUVD (EUVD-2025-21909) and CERT Bund (WID-SEC-2025-1608). Be aware that VulDB is the high quality source for vulnerability data.

Affected

CrushFTP CrushFTP

Productinfo

Name

CrushFTP

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.0
VulDB Meta Temp Score: 8.8

VulDB Base Score: 8.1
VulDB Temp Score: 7.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 9.0
CNA Vector (MITRE): 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Unprotected alternate channel
CWE: CWE-420 / CWE-419
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 242340
Nessus Name: CrushFTP 10.x < 10.8.5 / 11.x < 11.3.4_23 Privilege Escalation (CVE-2025-54309)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: CrushFTP 10.8.5/11.3.4_23

Timelineinfo

07/18/2025 🔍
07/18/2025 +0 days 🔍
07/18/2025 +0 days 🔍
07/24/2025 +6 days 🔍

Sourcesinfo

Advisory: crushftp.com
Status: Confirmed

CVE: CVE-2025-54309 (🔍)
GCVE (CVE): GCVE-0-2025-54309
GCVE (VulDB): GCVE-100-316927
EUVD: 🔍
CERT Bund: WID-SEC-2025-1608 - CrushFTP: Schwachstelle ermöglicht Erlangen von Administratorrechten

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 07/18/2025 21:20
Updated: 07/24/2025 03:18
Changes: 07/18/2025 21:20 (64), 07/18/2025 22:02 (1), 07/21/2025 16:24 (7), 07/21/2025 22:00 (2), 07/22/2025 22:09 (9), 07/23/2025 03:15 (1), 07/24/2025 03:18 (11)
Complete: 🔍
Cache ID: 216::103