Possible XSS vilnerability about manage HOT 2 OPEN

CVE-2021-43689 is assigned to this discovery.

manage (last update Oct 24, 2017) is affected by is affected by a Cross Site Scripting (XSS) vulnerability in Application/Home/Controller/GoodsController.class.php. The exit function will terminate the script and print a message which have values from $_POST.

from manage.

CVE-2021-43689 is assigned to this discovery.

manage（最后更新日期：24 年 2017 月 <> 日）受到应用程序/主页/控制器/货物控制器.class.php中跨站点脚本 （XSS） 漏洞的影响。exit 函数将终止脚本并打印值从 $_POST 起的消息。

我想知道这个xss的漏洞怎么修复的，我认为是是需要把这个post提交的数据，转换一下类型，不知道对不对，还是以什么方式阻止xss呢？

from manage.