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cve-2017 | Level: Easy  | Total Lab Runs: 0 | Premium Lab

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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 compromised remotely. Stored Cross Site Scripting vulnerabilities could be triggered even by unauthenticated users.

In the exercise below, the attacker is not authenticated to the web application and needs to find a stored XSS attack which can be used to attack other users.

MyBB is a free and open source forum software written in the PHP.

MyBB (1.8.13) is vulnerable to Stored Cross Site Scripting documented in CVE-2017-16781

Objective: Your mission is to find and exploit this vulnerability.

CVE is a registered trademark of The MITRE Corporation.

All relevant information to solve this lab is available on the CVE website.

The following activities are strictly prohibited on this website unless otherwise explicitly stated as allowed in the mission statement:

  • Using automated scanners
  • Using brute force attacks
  • Denial of Service attacks
  • Attacking other student machines in challenges where you might achieve a shell on the vulnerable system
  • Attacking the lab infrastructure

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