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Actively exploited in the wild. This CVE is on the CISA Known Exploited Vulnerabilities list — treat remediation as urgent. Federal remediation due by 4 Aug 2025.
Wing Ftp ServerApplication · Wftpserver

CVE-2025-47812

CRITICAL · 10.0 CVSS v3.1 Published 2025-07-10
Fix available
A fix is available. Upgrade to 7.4.4 or later.
See remediation →
100/100
Remediation priority · Urgent
In the wild High EPSS Public exploit Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In Wing FTP Server before 7.4.4. the user and admin web interfaces mishandle '\0' bytes, ultimately allowing injection of arbitrary Lua code into user session files. This can be used to execute arbitrary system commands with the privileges of the FTP service (root or SYSTEM by default). This is thus a remote code execution vulnerability that guarantees a total server compromise. This is also exploitable via anonymous FTP accounts.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Wing FTP Server before 7.4.4 improperly handles null bytes ('\0') in the user and admin web interfaces, allowing injection of arbitrary Lua code into user session files. This enables remote code execution with SYSTEM/root privileges, resulting in complete server compromise.

MitigationUpgrade to Wing FTP Server 7.4.4 or later immediately. Until patched, disable anonymous FTP access and restrict web interface exposure to trusted networks only.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Wing Ftp ServerApplication
Affected:< 7.4.4

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Verify Wing FTP Server is installed
    Check for Wing FTP Server installation by looking for the executable or service. On Windows, check Program Files for 'Wing FTP Server' folder or look for the service named 'WingFTPService'. On Linux, check /opt/wingftp or similar installation directories.
    Affected if Wing FTP Server executable or service is found on the system
  2. Determine installed version
    Access the admin web interface and check the version displayed on the login page or in the administration console, or check the WingFTPServer.xml or version.txt in the installation directory.
    Affected if The installed version number is less than 7.4.4
  3. Confirm web interface is accessible
    Attempt to reach the web interface on the configured port (typically 5466 for admin, 80/443 for user interface). Check HTTP/HTTPS response.
    Affected if The web interface responds and is accessible from the network
  4. Check if anonymous FTP access is enabled
    In the admin console, navigate to 'Users' and check if 'anonymous' user account exists and is enabled, or attempt anonymous FTP login to the server.
    Affected if Anonymous FTP account is enabled and allows login

The server is affected if Wing FTP Server is installed with a version lower than 7.4.4 and the web interface is accessible.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 7.4.4 or later
Fixed in 7.4.4
Interim mitigation

Upgrade to Wing FTP Server 7.4.4 or later immediately. Until patched, disable anonymous FTP access and restrict web interface exposure to trusted networks only.

Recommended fix High confidence

7.4.4

  1. 1. Download Wing FTP Server version 7.4.4 from the official vendor website (www.wftpserver.com)
  2. 2. Before upgrading, backup your current Wing FTP Server configuration and data directories
  3. 3. Stop the Wing FTP Server service
  4. 4. Install version 7.4.4 (or replace the existing installation files)
  5. 5. Start the Wing FTP Server service
  6. 6. Verify the upgrade was successful by checking the server version in the admin web interface
  7. 7. Review and test that all FTP, admin, and user web interface functionality is working correctly after upgrade
Caveat Review Wing FTP Server 7.4.4 release notes for any changes to configuration or features before upgrading

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Wing Ftp Server Exploited in the wild — priority engagement
  • Consultation3.0 h
  • Implementation3.0 h
  • Testing4.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,100
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An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,360.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-47812 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data