Security readout for executives and security teams
Plain-English summary
CVE-2025-47812 is a critical remote code execution flaw in Wing FTP Server before 7.4.4. A remote attacker can compromise the server through the web interfaces, potentially even where anonymous FTP is enabled. Successful exploitation can run system commands as the FTP service, which is root or SYSTEM by default.
Executive priority
Treat this as an emergency remediation item for any exposed Wing FTP Server. The issue is known exploited, requires no user interaction, and can give attackers full control of the host under high-privilege service accounts.
Technical view
The user and admin web interfaces mishandle null bytes, enabling arbitrary Lua injection into user session files. That can lead to operating system command execution with FTP service privileges. The CVSS score is 10.0 with network access, low complexity, no privileges, no user interaction, and full confidentiality, integrity, and availability impact.
Likely exposure
Organizations running Wing FTP Server versions before 7.4.4 are exposed, especially if the web interfaces are reachable from untrusted networks. Anonymous FTP support increases concern because the CVE description says exploitation is possible through anonymous FTP accounts.
Exploitation context
Active exploitation is supported by CISA KEV listing and a Huntress report describing exploitation in the wild. The vulnerability is remotely reachable, unauthenticated per CVSS, and can produce total server compromise when successful.
Researcher notes
Evidence supports RCE via null-byte mishandling and Lua session-file injection. Avoid assuming non-Wing FTP products are affected. Public sources identify 7.4.4 as the fixed boundary, but operational remediation details should be checked against vendor guidance.
Mitigation direction
- Upgrade Wing FTP Server to 7.4.4 or later.
- Review Wing FTP Server vendor guidance for any additional hardening steps.
- Restrict access to user and admin web interfaces from untrusted networks.
- Disable anonymous FTP where it is not explicitly required.
- Prioritize incident response for exposed pre-7.4.4 systems.
Validation and detection
- Inventory all Wing FTP Server instances and record exact versions.
- Confirm whether any instance is older than 7.4.4.
- Check whether user or admin web interfaces are internet-accessible.
- Verify whether anonymous FTP accounts are enabled.
- Review logs and host telemetry for suspicious command execution or session-file activity.
Public sources used
Michael Williams reviewed this cited source version on .
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-158: Exact CWE lookup
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Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2025-47812 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 10 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H3.96Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
10CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wftpserver.com/CVE reference
- https://www.rcesecurity.com/2025/06/what-the-null-wing-ftp-server-rce-cve-2025-47812/CVE reference
- https://www.vicarius.io/vsociety/posts/cve-2025-47812-mitigation-script-remote-code-execution-vulnerability-in-wing-ftp-serverCVE reference
- https://www.vicarius.io/vsociety/posts/cve-2025-47812-detection-script-remote-code-execution-vulnerability-in-wing-ftp-serverCVE reference
- https://www.huntress.com/blog/wing-ftp-server-remote-code-execution-cve-2025-47812-exploited-in-wildCVE reference · third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-47812CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Null Byte or NUL Character
Improper Neutralization of Null Byte or NUL Character represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.