CVE-2020-27735: Wftpserver Wing FTP Server

Medium severity, CVSS 6.1. EPSS: 5.8% chance of exploitation in the next 30 days.

An XSS issue was discovered in Wing FTP 6.4.4. An arbitrary IFRAME element can be included in the help pages via a crafted link, leading to the execution of (sandboxed) arbitrary HTML and JavaScript in the user's browser.

Affected products

• Wftpserver Wing FTP Server: version 6.4.4 only

Published 2021-01-26. Last modified 2026-06-17.