DedeCMS 5.7 SP2 is vulnerable to cross-site scripting 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.
View the template here CVE-2018-18608.yaml
References:
https://nvd.nist.gov/vuln/detail/CVE-2018-18608