Is CVE-2025-54309 in the CISA KEV catalog?

Yes. CVE-2025-54309 is on the CISA Known Exploited Vulnerabilities list, added 2025-07-22.

What is the CVSS severity of CVE-2025-54309?

CVE-2025-54309 has a CVSS v3 base score of 9.0 (CRITICAL).

What is the EPSS score for CVE-2025-54309?

CVE-2025-54309 has an EPSS score of 92.03% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-54309?

Upgrade crushftp to 11.3.4_23 or later.

CVE & CISA-KEV Catalog

CVE-2025-54309

CRITICALCISA KEVEPSS 100th pctl

9.0

CVSS v3

NVD

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.

CWE-420

How to fix

Remediation Available

crushftpNVD

Affected:>= 11.0.0, < 11.3.4_23Fixed in:11.3.4_23CVE-2025-54309derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

92.03%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

CrushFTP Unprotected Alternate Channel Vulnerability

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.

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

Remediation due: 2025-08-12

References

Vendor Advisory1

crushftp.com

Third-Party Advisory2

Government Resource1

cisa.gov

Press / Media2

Related Vulnerabilities

Other CWE-420 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-20198	Critical	10.0	100%	KEV	Fix
CVE-2024-10081	Critical	10.0	39%	-	Fix
CVE-2025-13315	Critical	9.8	33%	-	-
CVE-2024-6242	Unscored	-	9.2%	-	-
CVE-2025-53967	High	8.0	7.4%	-	-
CVE-2026-40217	High	8.8	6.5%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-05.