CVE-2025-47813: Wing FTP Server exploited

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

What it is

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.

Description quoted from the CVE record (assigned by mitre, published 2025-07-10).

Weakness: CWE-209 Generation of Error Message Containing Sensitive Information

How it can be exploited

Exploitable over the network with low attack complexity needing low privileges and no user interaction. Impact: confidentiality low, integrity none, availability none. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CISA assessment (SSVC): CISA assesses exploitation as active. Automatable: no. Technical impact: total.

On CISA KEV since: 2026-03-16
US federal deadline: 2026-03-30
Ransomware use: Not known

Public exploit evidence (Exploit Observer)

Also known as: BDU:2025-08716, CNNVD-202507-1512, EUVD-2025-21020, GHSA-2vvg-j984-hh8p

VEDAS cluster: VEDAS:FLORIDAFELINE

Exploit Observer links 6 pieces of public exploit code or detection modules that name this CVE or one of its aliases.

Exploit code and modules (6)

Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.

Research and write-ups (1)

Research or write-up: https://www.rcesecurity.com/2025/06/what-the-null-wing-ftp-server-rce-cve-2025-47813

Vulnerability databases and vendor advisories (6)

Catalogue entries, not exploit evidence.

Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2025-21020
Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-2vvg-j984-hh8p
Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-47813
Vulnerability database or vendor advisory: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-47813
Vulnerability database or vendor advisory: https://www.cnnvd.org.cn/home/globalSearch?keyword=CNNVD-202507-1512
Vulnerability database or vendor advisory: https://www.tenable.com/cve/CVE-2025-47813

13 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.

VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.

Live scores

EPSS: 0.625
very likely to be attacked soon
VEDAS: 0.983
strong exploit evidence
On CISA KEV: Yes, since 2026-03-16
Detection rule: Nuclei · Suricata

EPSS (chance of attack)

VEDAS (exploit evidence)

Thin horizontal line: the “likely” (EPSS 0.10) or “strong” (VEDAS 0.90) threshold. Shaded “no data” areas are periods when cve-scores did not publish. The vertical line is the day CISA added it to its exploited list.

VEDAS flagged this bug about 204 days before CISA confirmed attacks.

Who is affected

Product	Affected	Not affected
wftpserver Wing FTP Server	before 7.4.4	Not stated

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

Exploit Observer also maps it to: wftpserver wing_ftp_server, wing_ftp_software wing_ftp_server.

How to fix it

Fixed versions stated in the CVE record: 7.4.4.

CISA 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.

Vendor guidance:

How to detect it

Nuclei template (active check)

Wingftp - Information Disclosure
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.

Name and description quoted from the template, written by VEDAS.

The template sends 1 request (GET /loginok.html); it decides using regex, word matchers. Severity in the template: medium. Marked as not yet verified against a live vulnerable target.

Run it against a host you own or are authorised to test:

bash

nuclei -u https://your-host -t CVE-2025-47813.yaml

Show the template (55 lines)

yaml

id: CVE-2025-47813

info:
  name: "Wingftp - Information Disclosure"
  author: vedas-arpsyndicate
  severity: medium
  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.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2025-47813&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=wingftp&match=exact
  classification:
    cvss-metrics: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:NH
    cvss-score: 5.3
    cve-id: CVE-2025-47813
    cwe-id: CWE-209
  metadata:
    verified: false
  tags: cve,cve2025,wingftp,unauth,exposure,vuln,kev,vkev
variables:
  longuid: "{{repeat('A', 2048)}}"

http:
  - method: POST
    path:
      - "{{BaseURL}}/loginok.html"

    headers:
      Cookie: "UID={{longuid}}"
      Content-Type: application/x-www-form-urlencoded

    body: "username=anonymous&password=test"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "Server Path"
          - "Error"
          - ":\\\\"  # Windows path
          - "/usr/"  # Linux path
        condition: or

      - type: word
        part: header
        words:
          - "Wing FTP Server"

    extractors:
      - type: regex
        part: body
        regex:
          - '([a-zA-Z]:[\\/][^A\r\n]{10,})'

CVE-2025-47813.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2025-47813 Wingftp - Information Disclosure. Add them to your Suricata rule set and reload.

Show the rules

suricata

alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2025-47813 Wingftp - Information Disclosure"; flow:established,to_server; http.uri; content:"/loginok.html"; nocase; fast_pattern; classtype:web-application-attack; reference:cve,CVE-2025-47813; reference:url,https://www.exploit.observer/?keyword=CVE-2025-47813&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=wingftp&match=exact; sid:1009232; rev:1;)

CVE-2025-47813.rules on GitHub

References

Government sources

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-47813 (government-resource)

Other references

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, CISA KEV, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.