full-disclosure - [FD] CVE-2019-9955 Refelected XSS on Zyxel Login page

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Message-ID: <CA+Ma4JuAXnCGwc3Q7aATBAaudLNLEkoD4p-q1m4Uwvt2BYdDOQ@mail.gmail.com>
Date: Mon, 15 Apr 2019 12:26:58 -0600
From: aaron bishop <abishop@...ux.com>
To: fulldisclosure@...lists.org
Subject: [FD] CVE-2019-9955 Refelected XSS on Zyxel Login page

Numerous Zyxel devices are vulnerable to a reflected XSS issue on the login
page.  The mp_idx parameter is included in the page unsanitized.  A request
such a

https://$RHOST/?mobile=1&mp_idx=%22;alert(1);//

Will trigger an alert, demonstrating the issue.  A call to getScript() can
be used to include a full external JavaScript file to capture the
credentials of the user.

Disclosure at:
https://www.securitymetrics.com/blog/Zyxel-Devices-Vulnerable-Cross-Site-Scripting-Login-page

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