CVE-2025-54309 (GCVE-0-2025-54309)

Vulnerability from cvelistv5 – Published: 2025-07-18 00:00 – Updated: 2025-10-21 22:45
VLAI CISA Shadowserver KEVIntel
Summary
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.
Severity
9 (Critical)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-420 - Unprotected Alternate Channel
Assigner
References
Impacted products
Vendor Product Version
CrushFTP CrushFTP Affected: 10 , < 10.8.5 (custom)
Affected: 11 , < 11.3.4_23 (custom)
Create a notification for this product.
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 2736c737-51bf-40cc-b7a0-379050a01d38

Vulnerability ID: CVE-2025-54309

Status: Confirmed

Status Updated: 2025-07-22 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-07-22
Asserted: 2025-07-22
Scope
Notes: KEV entry: CrushFTP Unprotected Alternate Channel Vulnerability | Affected: CrushFTP / CrushFTP | Description: CrushFTP contains an unprotected alternate channel vulnerability. When the DMZ proxy feature is not used, mishandles AS2 validation and consequently allows remote attackers to obtain admin access via HTTPS. | 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. | Due date: 2025-08-12 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CompromiseJuly2025 ; https://nvd.nist.gov/vuln/detail/CVE-2025-54309
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-420
Feed CISA Known Exploited Vulnerabilities Catalog
Product CrushFTP
Due Date 2025-08-12
Date Added 2025-07-22
Vendorproject CrushFTP
Vulnerabilityname CrushFTP Unprotected Alternate Channel Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 12:25 UTC | Updated: 2026-02-06 07:17 UTC
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: f8326a46-a223-451d-beb1-06fddc836eec

Vulnerability ID: CVE-2025-54309

Status: Confirmed

Status Updated: 2025-12-11 00:00 UTC

Exploited: Yes

Characteristics
Severity: 98.0
Timestamps
First Seen: 2025-10-10
Asserted: 2025-10-10
Last Seen: 2025-12-11
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: CrushFTP / CrushFTP | Class: file-transfer | Severity: Critical (CVSS 9.8) | IoT: no | In CISA KEV: yes | Honeypot connections on 2025-12-11: 209
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 1
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class file-transfer
7D Avg 1
Vendor CrushFTP
30D Avg 0
90D Avg 1
Product CrushFTP
Cisa Kev yes
Connections 209
Observation Date 2025-12-11
Vulnerability Class CVSS
Vulnerability Score 9.8
Vulnerability Severity Critical
References
Created: 2026-06-30 09:42 UTC | Updated: 2026-06-30 10:22 UTC
KEVIntel
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: b93ad509-263a-474e-8433-c5e5670ae490

Vulnerability ID: CVE-2025-54309

Status: Confirmed

Status Updated: 2026-06-01 10:37 UTC

Exploited: Yes

Timestamps
First Seen: 2026-06-01
Asserted: 2026-06-01
Scope
Notes: KEVIntel entry: 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... | Affected: CrushFTP / CrushFTP | CVSS: 9.0 (CRITICAL) | EPSS: 0.92034 | Used in malware: unknown | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title 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...
Vendor CrushFTP
Product CrushFTP
Added Date 2026-06-01T10:37:11.050Z
Cvss Score 9.0
Epss Score 0.92034
Cvss Severity CRITICAL
Epss Percentile 0.99808
Used In Malware unknown
Ahead Of Cisa Kev 
{
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  "unit": "day"
}
Not Yet In Cisa Kev False
References
Created: 2026-06-23 14:03 UTC | Updated: 2026-06-23 14:03 UTC
Show details on NVD website
To clipboard 

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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.