Authorization Bypass in Medivision Digital Signage by UBICOD
CVE-2020-36902

9.3CRITICAL

Key Information:

Vendor

Ubicod Co., Ltd. | Medivision Inc.

Status
Ubicod Medivision Digital Signage
Vendor
CVE Published:
10 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2020-36902?

The UBICOD Medivision Digital Signage 1.5.1 software is compromised by an authorization bypass issue. This vulnerability enables unauthorized users to escalate their privileges to super admin by manipulating the 'ft[grp]' parameter. An attacker can exploit this flaw by sending a crafted GET request to the /html/user endpoint with 'ft[grp]' assigned to the integer value of '3', thereby gaining elevated privileges without requiring any form of authentication. This breach poses significant risks, particularly in environments where digital signage systems are critical for managing content.

Affected Version(s)

UBICOD Medivision Digital Signage Firmware 1.5.1 (2013.01.3)

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2020-36902 - Proof of Concept

References

https://www.exploit-db.com/exploits/48684
exploit
http://www.medivision.co.kr
product
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-55...
vendor-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

LiquidWorm as Gjoko Krstic of Zero Science Lab
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CVE-2020-36902 : Authorization Bypass in Medivision Digital Signage by UBICOD