CVE-2025-47812 on CISA KEV

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 SY

01What CISA says about this vulnerability

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…

02Required action — verbatim from CISA

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

03Notes & references

• www.wftpserver.com — https://www.wftpserver.com
• www.rcesecurity.com — https://www.rcesecurity.com/2025/06/what-the-null-wing-ftp-server-rce-cve-2025-4…
• www.vicarius.io — https://www.vicarius.io/vsociety/posts/cve-2025-47812-mitigation-script-remote-c…
• www.vicarius.io — https://www.vicarius.io/vsociety/posts/cve-2025-47812-detection-script-remote-co…

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
wftpserver	Wing FTP Server	0

06Detection

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