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CISA KEV · ACTIVELY EXPLOITED
MEDIUM severity

CVE-2025-47813 — Wing Ftp Server

MEDIUM

CVE-2025-47813 is a medium-severity (CVSS 4.3) CWE-209 vulnerability in wftpserver wing ftp server. It is in CISA's Known Exploited Vulnerabilities catalog (added 2026-03-16) — treat it as actively exploited and patch now. A fix is available — see the affected versions and patch details below.

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.

Published
Updated
Affected
1 product
Patched
See advisory
Exploits
None indexed
Exploitation data as of Oct 23, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

  • Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2026-03-16. Federal agencies were required to remediate by 2026-03-30.
  • A successful exploit gives an attacker total control of the affected component, not partial access.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2025-47813.

EPSS Exploitation Probability

via FIRST.org ↗
62.5%probability of exploitation in next 30 days
High Risk-0.60%
Lower risk than most CVEs99th percentile — riskier than 99% of all scored CVEsHighest risk
16.1%35.4%54.7%74.0%26.9%56.4%59.4%63.1%62.5%Jun 26Sep 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2025-47813 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 394,803 CVEs with a current EPSS score, this one falls in the 50–90% band (highlighted). Counts from FIRST.org, log-scaled.

Description

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.

Affected Products

1 product · 1 configurations
Application
wing ftp serverwftpserver
< 7.4.4
range

Detection & mitigation playbook

Vendor / appliance

  1. Detect

    Inventory every wftpserver wing ftp server deployment and check each version against the affected-products list above.

  2. Fix

    Apply the wftpserver wing ftp server security patch or hotfix for CVE-2025-47813 on the affected version, following the vendor advisory for your exact build.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

How to detect CVE-2025-47813

A community-maintained Nuclei template exists for this CVE. You can scan for it directly:

nuclei -id cve-2025-47813 -u https://target
Template
Wing FTP Server <= 7.4.3 - Path Disclosure via Overlong UID Cookie
Severity
medium
Impact
Authenticated attackers can supply an overlong UID cookie value to trigger error responses that disclose the full local filesystem path, aiding in further exploitation attempts.
Remediation
Upgrade Wing FTP Server to version 7.4.4 or later that properly validates UID cookie values.

Template by ProjectDiscovery nuclei-templates (rcesecurity, pdteam), MIT licensed. View the full template. Scan only systems you are authorised to test.

Frequently Asked Questions

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.
O3 Security · Runtime Protection

Is CVE-2025-47813 being exploited in your environment?

Detect and block the exploit chain at execution, on systems you cannot patch yet.

Protect my workloads How runtime protection works
CVE-2025-47813: Wing Ftp Server (Medium 4.3, KEV)