Lab: Reflected XSS in canonical link tag
This lab reflects user input in a canonical link tag and escapes angle brackets.
To solve the lab, perform a cross-site scripting attack that injects an attribute that calls the alert function.
To assist with your exploit, you can assume that the simulated user will press the following key combinations: Portswigger Reflected XSS in canonical link tag
ALT+SHIFT+X
CTRL+ALT+X
Alt+X
Please note that the intended solution to this lab is only possible in Chrome Or Mozilla .
Canonical Link Tag
A canonical URL is the URL of the page that Google thinks is most representative from a set of duplicate pages on your site. For example, if you have URLs for the same page (for example: example.com? dress=1234 and example.com/dresses/1234), Google chooses one as canonical.
Are canonical tags necessary?
You should be adding a canonical tag wherever you have duplicate content on your site. Similar content: Let's say you have an e-commerce store with products that are very similar but may have slight differences between them. In this case, most SEO experts say you should use canonical tags.
Lab Here :- Click Me
Solution
Visit the following URL, replacing your-lab-id with your lab ID:
https://your-lab-id.web-security-academy.net/?%27accesskey=%27x%27onclick=%27alert(1)
This sets the X key as an access key for the whole page. When a user presses the access key, the alert function is called.
To trigger the exploit on yourself, press one of the following key combinations:
On Windows: ALT+SHIFT+X
On MacOS: CTRL+ALT+X
On Linux: Alt+X
Video Tutorial :-
Disclaimer
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