CVE-2025-47813: Wing FTP Server information disclosure in loginok.html

CVE-2025-47813 · Severity: critical · CVSS 4.3 · Exploited in the wild · Published 2026-03-16

Wing FTP Server, a file transfer solution used for corporate data exchange, is vulnerable to an information disclosure flaw. An attacker can force the system to reveal its internal file directory structure and installation path. This information can be used by malicious actors to plan more sophisticated attacks against the server's underlying operating system.

Technologies: Wing FTP Server. Vendors: Wing FTP Server.

Quick answers

Is CVE-2025-47813 exploited in the wild?
Yes. CVE-2025-47813 is known to be exploited in the wild, first recorded on 16 March 2026. Treat it as urgent.
How severe is CVE-2025-47813?
Critical severity, with a CVSS score of 4.3, published 16 March 2026.
Which products and versions are affected?
Wing FTP Server Wing FTP Server versions before 7.4.4.
Is there a fix for CVE-2025-47813?
A patch was published on 2025-07-10: Fixed in version 7.4.4 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2025-47813 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2025-47813?
Check whether you run Wing FTP Server. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An information disclosure vulnerability exists in Wing FTP Server's loginok.html component due to improper error handling (CWE-209). When a user provides an excessively long value in the UID cookie, the application generates an error message that reveals the full local installation path of the application. This is a network-based attack that requires low privileges (authenticated user). While the disclosure itself does not allow for code execution, it provides critical reconnaissance data for attackers. The vulnerability is addressed in version 7.4.4. Notably, this flaw has been observed in the wild and is included in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Affected products

  • Wing FTP Server Wing FTP Server versions before 7.4.4

Timeline

  • 2025-07-10: disclosed: Initial CVE publication
  • 2026-03-16: kev added: Added to CISA Known Exploited Vulnerabilities catalog
  • 2025-07-10: patched: Fixed in version 7.4.4

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