QiHang Media Web Digital Signage 3.0.9 Unauthenticated Arbitrary File Deletion

Advisories

severity: critical
date: December 10, 2025
Affecting: QiHang Media Web Digital Signage 3.0.9
CVE: CVE-2020-36898
CWE: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSS: 8.8
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
References: ExploitDB-48749
Official Product Homepage
Zero Science Lab Disclosure (ZSL-2020-5580)
Credit: LiquidWorm as Gjoko Krstic of Zero Science Lab
Description: QiHang Media Web Digital Signage 3.0.9 contains an unauthenticated file deletion vulnerability in the QH.aspx endpoint that allows remote attackers to delete files without authentication. Attackers can exploit the 'data' parameter by sending a POST request with file paths to delete arbitrary files with web server permissions using directory traversal sequences.