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Cross Site Scripting (XSS) issues when using URL Queries that are shown in the address field

Thread began 9/16/2020 11:10 am by Steve | Last modified 9/16/2020 12:52 pm by Steve | 57 views | 4 replies


Cross Site Scripting (XSS) issues when using URL Queries that are shown in the address field

I have a client that is getting flagged as having XSS vulnerabilities on their site.
For instance we have a generic page that uses the URL string as a value in the page. These are Cities and allow a number of pages to have some SEO benefit without having to write Content for each city.


But this string will also allow html tags such as :<h1>Riverside</h1>

This show that "tags" can be used in the page and is being flagged as an XSS vulnerability.

Personally I don't see how this could be a problem other than our client getting notices from companies that want to solve this condition.

Should I sanitize the URL parameter input prior to using in the page or is it best practice to disallow the page to render IF a certain characters are present (<> etc)?


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