It seems that when I redirect to a relative url in the root it enables an open redirect. This seems to be introduced in the new version of the NotFound-handler.
This is the redirect-rule which was enabled in the old (episerver 11) version (I replaced our site in the example below):
<url>
<old redirectType="Permanent">/www/somesite/nl/</old>
<new>/?utm_source=www.somesite.nl&utm_medium=redirect&utm_campaign=rebranding</new>
</url>
This rule was exported from episerver 11 and imported in the new version in version 12.
When this rule is enabled in the new version we enable an open redirect. As an example, navigating to this url:
https://www.oursite.nl/www/somesite/nl/google.com
will redirect the browser to google.com.
The location-header is set to https://google.com/?utm_source=www.somesite.nl&utm_medium=redirect&utm_campaign=rebranding
It seems that when I redirect to a relative url in the root it enables an open redirect. This seems to be introduced in the new version of the NotFound-handler.
This is the redirect-rule which was enabled in the old (episerver 11) version (I replaced our site in the example below):
This rule was exported from episerver 11 and imported in the new version in version 12.
When this rule is enabled in the new version we enable an open redirect. As an example, navigating to this url:
https://www.oursite.nl/www/somesite/nl/google.com
will redirect the browser to google.com.
The location-header is set to https://google.com/?utm_source=www.somesite.nl&utm_medium=redirect&utm_campaign=rebranding