12 Jan

Vulnerability Details: Persistent Cross-Site Scripting (XSS) Vulnerability in Chained Quiz

From time to time vulnerabilities are fixed in plugin without someone putting out a report on the vulnerability and we will put out a post detailing the vulnerability. While putting out the details of the vulnerability increases the chances of it being exploited, it also can help to identify vulnerabilities that haven’t been fully fixed (in some cases not fixed at all) and help to identify additional vulnerabilities in ...


Our Vulnerability Details posts provide the details of vulnerabilities we didn't discover and access to them is limited to customers of our service due to other security companies trying to sponge off the work needed to create those instead of doing their own work.

For existing customers, please log in to your account to view the rest of the post.

If you are not currently a customer, you can try the service for free for the first month (there are a lot of other reason that you will want to sign up beyond access to posts like this one).

If you are a WordPress plugin security researcher please contact us to get free access to all of our Vulnerability Details posts.

2 thoughts on “Vulnerability Details: Persistent Cross-Site Scripting (XSS) Vulnerability in Chained Quiz

  1. “Any available cookies will be shown in alert box on that page.”

    This is simply not true. The HTML is shown as HTML on the page because it is escaped. The plugin MUST allow all kind of input from users because it can be used to examine HTML knowledge.

    • Prior to what you are quoting we noted the vulnerability was fixed by escaping the output. The proof of concept you are quoting shows how the vulnerability would be exploited in prior versions, before the escaping was done, so that seems to be what is confusing you about this.

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