A stored cross-site scripting (XSS) vulnerability exists in ZZCMS2023 in the ask/show.php file at line 21. An attacker can exploit this vulnerability by sending a specially crafted POST request to /user/ask_edit.php?action=add, which includes malicious JavaScript code in the 'content' parameter. When a user visits the ask/show_{newsid}.html page, the injected script is executed in the context of the user's browser, leading to potential theft of cookies, session tokens, or other sensitive information.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.