concrete5 Cross-Site Request Forgery (CSRF) Vulnerability - CVE-2017-8082
concrete5 8.1.0 has CSRF in Thumbnail Editor in the File Manager which allows remote attackers to disable the entire installation by merely tricking an admin into viewing a malicious page involving the /tools/required/files/importers/imageeditorfID1ampimgData URI. This results in a site-wide denial of service making the site not accessible to any users or any administrators.