Vulnerability · Published Nov 2, 2026 · Assigned by VulnCheck

CVE-2026-120491Wing FTP Server before 8.2.6 Stored XSS via nowpath in Legacy Activity Page

Medium 5.4

In plain English

A medium-severity cross-site scripting in Wing FTP Server from Wing FTP Software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.2%top 92.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack tooling1Public PoC

Official description

Wing FTP Server before 8.2.6 contains a stored cross-site scripting vulnerability that allows authenticated web-client users to inject script by sending a crafted nowpath parameter to webclient/makethumb.html. Attackers can break out of the directory CDATA section in admin_get_lastconn.html XML to forge a connection id, which executes in administrators' browsers when admin_connection_list.html auto-refreshes, enabling Lua console abuse.

Affected products (as reported)

Vendor	Product	Versions
Wing FTP Software	Wing FTP Server	0 – before 8.2.6

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References

https://www.wftpserver.com/serverhistory.htm vendor-advisory, release-notes
VulnCheck Advisory: Wing FTP Server before 8.2.6 Stored XSS via nowpath in Legacy Activity Page third-party-advisory