In DedeCMS 5.7SP2, attackers can upload a .php file to the uploads/ directory (without being blocked by the Web Application Firewall), and then execute this file, via this sequence of steps: visiting the management page, clicking on the template, clicking on Default Template Management, clicking on New Template, and modifying the filename from ../index.html to ../index.php.
DedeCMS through V5.7SP2 allows arbitrary file upload in dede/album_edit.php or dede/album_add.php, as demonstrated by a dede/album_edit.php?dopost=save&formzip=1 request with a ZIP archive that contains a file such as "1.jpg.php" (because input validation only checks that .jpg, .png, or .gif is present as a substring, and does not otherwise check the file name or content).
uploads/include/dialog/select_soft.php in DedeCMS V57_UTF8_SP2 allows remote attackers to execute arbitrary PHP code by uploading with a safe file extension and then renaming with a mixed-case variation of the .php extension, as demonstrated by the 1.pHP filename.
An issue was discovered in DedeCMS V5.7 SP2. uploads/include/dialog/select_images_post.php allows remote attackers to upload and execute arbitrary PHP code via a double extension and a modified ".php" substring, in conjunction with the image/jpeg content type, as demonstrated by the filename=1.jpg.p*hp value.
DedeCMS 5.7 SP2 allows XSS via the function named GetPageList defined in the include/datalistcp.class.php file that is used to display the page numbers list at the bottom of some templates, as demonstrated by the PATH_INFO to /member/index.php, /member/pm.php, /member/content_list.php, or /plus/feedback.php.