CVE-2026-123622— Usermin through 2.570 XSS via mailbox detach.cgi type Parameter

Quick assessment

Affected

webmin usermin

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.

Usermin 2.570 及更早版本在组件中存在跨站脚本（XSS）漏洞。远程攻击者可通过提供任意的参数来绕过 JavaScript 过滤机制，从而执行恶意脚本。攻击者可以发送包含脚本的 HTML 附件，并诱骗收件人点击指向且参数为的链接，进而在受害者的已认证 Usermin 会话中执行该脚本。

CVSS 6.1 · Medium Updated Nov 06, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Usermin through 2.570 XSS via mailbox detach.cgi type Parameter

Source: CVE Program / CVE List V5

Vulnerability Description

Usermin through 2.570 contains a cross-site scripting vulnerability in mailbox/detach.cgi that allows remote attackers to execute script by supplying an arbitrary type parameter that bypasses JavaScript filtering. Attackers can email an HTML attachment containing script and lure recipients to a detach.cgi link with type=text/html to run script in the victim's authenticated Usermin session.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/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
webmin	usermin	0 ~ 2.570	-

II. Public POCs for CVE-2026-123622

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-123622

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Other References for CVE-2026-123622 (6)

https://github.com/webmin/usermin product
https://github.com/webmin/usermin/issues/142 issue-tracking
https://github.com/webmin/usermin/commit/c5c43b9ad04a60809ac2eb271bf8f3d0fec2e46a patch
https://hackmd.io/@leediay/H144QKY6zl technical-description
https://github.com/webmin/usermin/blob/2.570/mailbox/detach.cgi#L80-L83 technical-description
https://www.vulncheck.com/advisories/usermin-through-2.570-xss-via-mailbox-detach-cgi-type-parameter third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-123622

Same Patch Batch · webmin · 2026-11-06 · 3 CVEs total

CVE-2026-123621	8.8 HIGH	Usermin through 2.570 Path Traversal File Write via detachall.cgi
CVE-2026-123620	7.5 HIGH	Usermin through 2.570 OS Command Injection via Read Mail IMAP Folder Deletion

IV. Related Vulnerabilities

Same product: usermin

Same vendor: webmin

Same weakness: CWE-79