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

Quick assessment

Affected

Wing FTP Software Wing FTP Server

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Wing FTP Server 8.2.6 之前版本存在存储型跨站脚本（XSS）漏洞。已认证的 Web 客户端用户可通过向发送特制的参数注入恶意脚本。攻击者可利用该漏洞突破中 XML 的 CDATA 节目录制目录，伪造连接 ID；当自动刷新时，该伪造的连接 ID 将在管理员浏览器中执行，进而导致 Lua 控制台被滥用。

CVSS 5.4 · Medium Updated Nov 03, 2026

Possible ATT&CK Techniques 2 AI

T1059.007 · JavaScript T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Wing FTP Server before 8.2.6 Stored XSS via nowpath in Legacy Activity Page

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

在Web页面生成时对输入的转义处理不恰当(跨站脚本)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Wing FTP Software	Wing FTP Server	0 ~ 8.2.6	-

II. Public POCs for CVE-2026-120491

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-120491

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Vendor Pages for CVE-2026-120491 (1)

Wing FTP Server History vendor-advisory release-notes

Other References for CVE-2026-120491 (1)

https://www.vulncheck.com/advisories/wing-ftp-server-before-8.2.6-stored-xss-via-nowpath-in-legacy-activity-page third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-120491

IV. Related Vulnerabilities

Same product: Wing FTP Server

Same weakness: CWE-79