Affected: EC-WEB FS-EZViewer(Web), e-webinformationco fs-ezviewer

EC-WEB FS-EZViewer(Web)'s query functionality lacks proper restrictions of user input, allowing remote attackers authenticated as regular user to inject SQL commands for reading, modifying, and deleting database records, as well as executing system commands. Attackers may even leverage the dbo privilege in the database for privilege escalation, elevating their privileges to administrator.