MapServer: Reflected XSS in OpenLayers HTML Output via `HTTP_X_FORWARDED_HOST`

{
                    "vendor": "MapServer",
                    "product": "MapServer",
                    "versions": [
                        {
                            "version": ">= 6.0, < 8.6.4",
                            "status": "affected"
                        }
                    ]
                }