CVE-2025-47813 — Wing FTP Server Information Disclosure Vulnerability

loginok.html in Wing FTP Server before 7.4.4 discloses the full local installation path of the application when using a long value in the UID cookie.

01What is this vulnerability?

loginok.html in Wing FTP Server before 7.4.4 discloses the full local installation path of the application when using a long value in the UID cookie.

02Affected products

Vendor	Product	Versions
wftpserver	Wing FTP Server	0

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2026-03-16. Ransomware use: Unknown.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

08Timeline

• Published: 2025-07-10T00:00:00.000Z
• Last modified: 2026-03-17T12:41:40.769Z
• Added to CISA KEV: 2026-03-16
• BOD 22-01 due: 2026-03-30

09References

• 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…
• github.com — https://github.com/MrTuxracer/advisories/blob/master/CVEs/CVE-2025-47813.txt