Wing FTP Server Improper Neutralization of Null Byte or NUL Character Vulnerability
wftpserver — Wing FTP Server
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.
10.0
92.8%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- 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
- Published
- Jul 10, 2025
- Modified
- Feb 26, 2026
- Added to KEV
- Jul 14, 2025
- Federal patch due
- Aug 4, 2025
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2025-47812, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit — cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2025-47812 were found at last check. Absence here is not proof no exploit exists — see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-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 default). This is thus a remote code execution vulnerability that guarantees a total server compromise. This is also exploitable via anonymous FTP accounts.
How severe is CVE-2025-47812?
CVE-2025-47812 has a CVSS base score of 10.0 out of 10 (CVSS 3.1).
Is CVE-2025-47812 actively exploited in the wild?
Yes. CVE-2025-47812 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jul 14, 2025, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2025-47812?
92.8% - meaning FIRST.org's EPSS model estimates a 92.8% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2025-47812?
Yes - a public Nuclei template referencing CVE-2025-47812 exist in public repositories we checked.
What type of vulnerability is CVE-2025-47812?
CVE-2025-47812 is classified under CWE-158 (CWE-158 Improper Neutralization of Null Byte or NUL Character).
Cross-checked against
Impactr finds and proves whether CVE-2025-47812 — or flaws like it — are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.