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In this exercise, the attacker has admin access already so there is nothing more to be done. However, looks like the admin access does lead to an XSS attack. So you can try to find this XSS as purely academic exercise.Concrete5 CMS is a free and open-source content management system (CMS) written in PHP. It is built on a model–view–controller web application framework and support plugins for extending the functionality.
Concrete5 (8.4.3) is a vulnerable to Stored Cross Site Scripting documented in CVE-2018-19146.
The following username and passwords may be used to explore the application and/or find a vulnerability which might require authenticated access:
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