CVE-2025-47812: Wing FTP Server Improper Neutralization of Null Byte or NUL Character Vulnerability
In CISA’s Known Exploited Vulnerabilities catalog: Wing FTP Server Improper Neutralization of Null Byte or NUL Character Vulnerability.
Added , federal remediation due . Known ransomware use: Unknown.
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.
Description
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.
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H · CWE-158
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
wftpserver: Wing FTP Server
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- www.rcesecurity.com/2025/06/what-the-null-wing-ftp-server-rce-cve-2025-47812/ (opens in new tab)
- www.vicarius.io/vsociety/posts/cve-2025-47812-detection-script-remote-code-execution-… (opens in new tab)
- www.vicarius.io/vsociety/posts/cve-2025-47812-mitigation-script-remote-code-execution… (opens in new tab)
- www.wftpserver.com (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)