v5/config/system.php in dayrui FineCms 5.2.0 has a default SYS_KEY value and does not require key regeneration for each installation, which allows remote attackers to upload arbitrary .php files via a member api swfupload action to index.php.Referenceshttps://gitee.com/dayrui/finecms/commit/ff4b7ad3c3fbd3245b3bb7bc774d20c9705d9882https://user-images.githubusercontent.com/31153532/33065202-21b536f2-cee3-11e7-997a-c7d4f1b00ca7.jpg
