GHSA-5F5V-5C3V-GW5V Silverstripe IE requests not properly behaving with rewritehashlinks

Non IE browsers don’t appear to be affected, but I haven’t tested a wide range of browsers to be sure Requests that come through from IE do NOT appear to encode all entities in the URL string, meaning they are inserted into output content directly by SSViewer::process when rewriting hashlinks, as...