What is CVE-2023-37881?

CVE-2023-37881 is a medium-severity vulnerability in Wftpserver Wing FTP Server, classified under Incorrect Authorization. CVSS score: 4.9/10. Published 2023-09-12.

How severe is CVE-2023-37881?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Auth bypass in Wftpserver Wing FTP Server

CVE-2023-37881

Weak access control in Wing FTP Server (Admin Web Client) allows for privilege escalation.This issue affects Wing FTP Server: <= 7.2.0.

Vulnerability class: Broken Access Control

Published 2023-09-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (44.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.001

Affected products

Wftpserver Wing FTP Server
Wing FTP Server — versions <= 7.2.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

www.wftpserver.com/serverhistory.htm (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2023-37881?: CVE-2023-37881 is a medium-severity vulnerability in Wftpserver Wing FTP Server, classified under Incorrect Authorization. CVSS score: 4.9/10. Published 2023-09-12.
How severe is CVE-2023-37881?: Medium severity. CVSS v3 base score is 4.9 out of 10.