Secuno
ENNL
Book demo

CVE-2025-54309

CrushFTP Unprotected Alternate Channel

9.0 CRITICALActively exploited (CISA KEV)EPSS 95.1%
  1. Published18 Jul 2025
  2. Added to CISA KEV22 Jul 2025
  3. Remediation due12 Aug 2025
Actively exploited (CISA KEV)

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.

Added to KEV: 22 Jul 2025Federal remediation due: 12 Aug 2025

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

Crushftp≥ 10.0.0 < 10.8.5 · ≥ 11.0.0 < 11.3.4_23

Remediation

Fixed in
Crushftp≥ 10.8.5

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-402178.8
LiteLLM through 2026-04-08 allows remote attackers to execute arbitrary code via…
CVE-2025-620018.8
BullWall Ransomware Containment supports configurable file and directory exclusions…
CVE-2025-133159.8
Twonky Server 8.5.2 on Linux and Windows is vulnerable to an access control flaw. An…
CVE-2025-539678.0
Framelink Figma MCP Server before 0.6.3 allows an unauthenticated remote attacker to…
CVE-2025-85578.8
An internal product security audit of Lenovo XClarity Orchestrator (LXCO) discovered…
CVE-2025-543518.9
In iperf before 3.19.1, net.c has a buffer overflow when --skip-rx-copy is used (for…

Frequently asked

Is CVE-2025-54309 being actively exploited?

Yes. CVE-2025-54309 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 22 Jul 2025.

How severe is CVE-2025-54309?

CVE-2025-54309 has a CVSS 3.1 base score of 9.0, rated critical. EPSS estimates a 95.1% probability of exploitation.

Which products are affected by CVE-2025-54309?

Affected products include Crushftp.

How do I fix CVE-2025-54309?

Upgrade affected software to a fixed version, for example Crushftp 10.8.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-54309 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.