J5.x:Pagination class removes query parameters
From Joomla! Documentation
Errors reported
This release for Joomla 5.1.3 and 4.4.7 changed how the Pagination class generates links. After the update, previously added parameters are missing.
Versions affected
This pertains only to Joomla! version(s): 5.1.3, 4.4.7
What is the cause
So far, the links for the individual pages as well as the "first", "last", "next" and "previous" page automatically included all query parameters that are present in the current request. That behavior create a cache poisoning attack vector.
In order to mitigate that vector, a behavior change had to be introduced. The pagination class will by default only include the following query parameters into the URL generation process:
- format
- option
- view
- layout
- tpl
- id
- Itemid
How to fix
If your extension needs additional parameters, you have to register them using the "setAdditionalUrlParam" method. See the Archive view of com_content as an example: https://github.com/joomla/joomla-cms/blob/51032f65eb10bb9a78be7c264b511a933740318e/components/com_content/src/View/Archive/HtmlView.php#L220