DedeCMS through 5.6 allows arbitrary file upload and PHP code execution by embedding the PHP code in a .jpg file, which is used in the templet parameter to member/articleedit.php.
Multiple SQL injection vulnerabilities in DeDeCMS, possibly 5.6, allow remote attackers to execute arbitrary SQL commands via the id parameter to (1) list.php, (2) members.php, or (3) book.php.
A file upload issue exists in DeDeCMS before 5.7-sp1, which allows malicious users getshell.