Authentication Bypass in Eibiz i-Media Server Digital Signage
CVE-2020-36894

9.3CRITICAL

Key Information:

Vendor

Eibiz Co.,ltd.

Status
I-media Server Digital Signage
Vendor
CVE Published:
10 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2020-36894?

The Eibiz i-Media Server Digital Signage version 3.8.0 is susceptible to an authentication bypass vulnerability, which permits unauthorized attackers to create administrative users remotely. By manipulating AMF-encoded serialized objects and sending them to the /messagebroker/amf endpoint, attackers can bypass all security measures. This vulnerability poses a significant risk as it allows malicious entities to gain administrative access without proper credentials.

Affected Version(s)

i-Media Server Digital Signage 0 <= 3.8.0

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-2020-36894 - Proof of Concept

References

https://www.exploit-db.com/exploits/48763
exploit
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-55...
vendor-advisory
http://www.eibiz.co.th
technical-description

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-2020-36894 : Authentication Bypass in Eibiz i-Media Server Digital Signage