CVE-2025-47813
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.
do firstApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Can a WAF block it? Partly. The vulnerability is triggered by sending a long value in the UID cookie in an HTTP request, which is unusual and can be detected by a WAF rule matching abnormally long cookie values. A WAF rule can match UID cookie with an unusually long value. No tracked WAF vendor has published a rule for this CVE yet, so you would write it yourself.
What a custom rule would match: UID cookie with an unusually long value
Also consider: patch · custom WAF rule · custom error pages
Based on an AI reading of the CVE description, and no vendor rule found yet. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.
Is CVE-2025-47813 being exploited?
Yes. CVE-2025-47813 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2025-47813?
CVE-2025-47813 is rated Medium with a CVSS score of 4.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2025-47813?
Yes. A fix has been recorded for CVE-2025-47813. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2025-47813 affect?
CVE-2025-47813 affects wftpserver:wing_ftp_server. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
- affected< 7.4.4
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.
public exploits
Detection templates only, no public exploit found: 1 Nuclei template
- Wing FTP Server <= 7.4.3 - Path Disclosure via Overlong UID Cookie · detection template · medium
Listed so you can judge urgency, not as a recommendation to run anything. GitHub “proofs of concept” are unvetted: some are fake or carry malware. Exploit-DB marks the entries its staff verified.
cisa ssvc
- exploitation
- active
- automatable
- no
- technical impact
- total
Assessed by CISA 17 Mar 2026 (SSVC 2.0.3).
timeline
- 10 Jul 2025Published
- 16 Mar 2026Added to CISA KEV (exploited in the wild) · 248 days (about 8 months) later
- 17 Mar 2026CISA SSVC assessment: exploitation active · 1 day later
- 17 Mar 2026CVE record last updated · same day later
- 30 Mar 2026CISA remediation due date (US federal agencies) · 12 days later
- 2 Nov 2026Analysed by vulneraibility.com · 218 days (about 7 months) later
- Linkwftpserver.com
- Linkrcesecurity.com /2025/06/what-the-null-wing-ftp-server-rce-cve-2025-47812/
- Linkgithub.com /MrTuxracer/advisories/blob/master/CVEs/CVE-2025-47813.txt
- Linkcisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-47813
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA KEV catalog: exploitation, date added, due date
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- Nuclei templates: detection templates
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.