cyask system background Getshell vulnerabilities-vulnerability warning-the black bar safety net

cyask will set the parameters to the write cache, the write cache when removed from the database unfiltered data directly to write the file, resulting in can get webshell Analysis: admin/settingmanage. php file: ? php adminfooter; exit; elseif$adminaction=='settingedit' ifisset$POST'editsubmit'...