Executive Summary

This vulnerability exists in QiHang Media Web Digital Signage 3.0.9 and allows remote attackers to delete files on the web server without any authentication. It occurs because the QH.aspx endpoint improperly handles the 'data' parameter in POST requests, enabling attackers to specify file paths with directory traversal sequences to delete arbitrary files with the permissions of the web server.

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Impact Analysis

An attacker exploiting this vulnerability can delete arbitrary files on the affected server, potentially causing denial of service, loss of critical data, or disruption of services. Since no authentication is required, the risk is high, and the attacker can manipulate or remove files that the web server has access to, which could compromise the integrity and availability of the system.

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