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List:       full-disclosure
Subject:    [FD] CVE-2019-9955 Refelected XSS on Zyxel Login page
From:       aaron bishop <abishop () linux ! com>
Date:       2019-04-15 18:26:58
Message-ID: CA+Ma4JuAXnCGwc3Q7aATBAaudLNLEkoD4p-q1m4Uwvt2BYdDOQ () mail ! gmail ! com
[Download RAW message or body]

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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