Lab 5: User ID controlled by request parameter, with unpredictable user IDs


I entered the site and logged in with the credentials given to me.

The first thing that stood out to me was the API key.

After getting this I decided that it was best to look at the request with Burpsuite

after doing this I went to all the posts and checked that the blog ID had a reference to the user id and that I could change this ID to gain access to other users.



After doing it with Admin I found a post by Carlos that had a reference to his account and used it .

Here is Carlos Account and the API key.

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