CVE-2020-36894 CRITICAL

CVE-2020-36894: Eibiz i-Media Server Digital Signage 3.8.0 Unauthenticated User Creation Vulnerability

Vendor Eibiz Co.,Ltd.
Product i-Media Server Digital Signage
Weakness CWE-306 · Missing auth
Published December 10, 2025
Last update April 7, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

Eibiz i-Media Server Digital Signage 3.8.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to create admin users through AMF-encoded object manipulation. Attackers can send crafted serialized objects to the /messagebroker/amf endpoint to create administrative users without authentication, bypassing security controls.

Key dates

02Disclosure timeline

December 10, 2025 CVE published
April 7, 2026 Record updated