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The attacker might not have any user level access to the web application. However, this does not mean that the application cannot be attacked remotely. User Enumeration vulnerabilities could be triggered even by unauthenticated users.
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 (before 8.3.0) is vulnerable to User Enumeration documented in CVE-2017-18195.
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You may use the username and password below to explore the application but cannot use it to exploit it.
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