CVE-2025-47812

Wing FTP Server Improper Neutralization of Null Byte or NUL Character Vulnerability

Published Jul 10, 2025 · corrected/updated Jun 17, 2026 · wftpserver wing ftp server · evidence confidence very high

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.

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2025-47812 is a critical public vulnerability record for wftpserver wing ftp server. CISA lists it as known exploited. Published remediation guidance: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether wftpserver wing ftp server is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: wftpserver/wing ftp server; Wing FTP Server Wing FTP Server. Published remediation guidance: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: CVSS 10.0, EPSS 93.9%. CISA lists it as known exploited. Weakness classes: CWE-158. Sources contributing to this record: cisa_kev, cve_org, epss, exploitdb. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

Exploitation evidence
Confirmed in CISA KEV since Jul 14, 2025. Listed in the CISA Known Exploited Vulnerabilities catalog.
Patch and remediation
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA due date Aug 4, 2025.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

Jul 10, 2025 · Catalog
Detected
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 explo
Jul 14, 2025 · CISA KEV
Known exploited
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Aug 4, 2025 · CISA KEV
Remediation due
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Jun 17, 2026 · Catalog
Updated
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 explo

Affected

cpe wftpserver/wing ftp serverversion unspecified
vendor Wing FTP Server Wing FTP Serverversion unspecified

Sources

CISA KEVConfirmed exploitationCVE-2025-47812
Wing FTP Server contains an improper neutralization of null byte or NUL character vulnerability that can allow 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).
cisa.gov
CVE.orgVulnerability recordCVE-2025-47812
Official CVE identifier
cve.org
FIRST EPSSExploitation probabilityCVE-2025-47812
30-day exploitation probability 93.9%
first.org
Exploit DatabasePublic exploit reference52347
Public archive entry. The exploit body is not stored here.
exploit-db.com
Metasploit ModulesPublic exploit moduleexploit_multi/http/wingftp_null_byte_rce
Public module reference (excellent). Module source is not copied into this catalog.
rapid7.com
Metasploit ModulesPublic exploit moduleexploit_windows/ftp/wing_ftp_admin_exec
Public module reference (excellent). Module source is not copied into this catalog.
rapid7.com
NIST NVDVulnerability recordCVE-2025-47812
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 de
nvd.nist.gov