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/imageeditor?fID1&imgData URI. This results in a site-wide denial of service making the site not accessible to any users or any administrators.
Publication date: Mon, 24 Apr 2017 11:59:00 +0000