When the default servlet in Apache Tomcat versions 9.0.0.M1 to 9.0.11, 8.5.0 to 8.5.33 and 7.0.23 to 7.0.90 returned a redirect to a directory (e.g. redirecting to '/foo/' when the user requested '/foo') a specially crafted URL could be use…

{
                    "product": "Apache Tomcat",
                    "vendor": "Apache Software Foundation",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "9.0.0.M1 to 9.0.11"
                        },
                        {
                            "status": "affected",
                            "version": "8.5.0 to 8.5.33"
                        },
                        {
                            "status": "affected",
                            "version": "7.0.23 to 7.0.90"
                        }
                    ]
                }