UBICOD Medivision Digital Signage 1.5.1 Authorization Bypass via User Privileges

Advisories

severity: critical
date: December 10, 2025
Affecting: UBICOD Medivision Digital Signage Firmware 1.5.1 (2013.01.3)
CVE: CVE-2020-36902
CWE: CWE-862 Missing Authorization
CVSS: 9.3
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References: ExploitDB-48684
Medvision Vendor Homepage
Zero Science Lab Disclosure (ZSL-2020-5575)
Credit: LiquidWorm as Gjoko Krstic of Zero Science Lab
Description: UBICOD Medivision Digital Signage 1.5.1 contains an authorization bypass vulnerability that allows normal users to escalate privileges by manipulating the 'ft[grp]' parameter. Attackers can send a GET request to /html/user with 'ft[grp]' set to integer value '3' to gain super admin rights without authentication.