---
id: CVE-2020-36894
title: >-
  Eibiz i-Media Server Digital Signage 3.8.0 Unauthenticated User Creation
  Vulnerability
summary: >-
  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…
severity: critical
cvss: 9.3
cvssVector: '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'
cvssSource: cna
cwe:
  - CWE-306
vendor: 'EIBIZ Co.,Ltd.'
product: i-Media Server Digital Signage
affected:
  - i-media_server_digital_signage <= 3.8.0
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2025-12-11T15:58:10.356711Z'
exploitAvailable: true
published: '2025-12-10'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T15:19:32.494Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2020-36894'
references:
  - url: 'https://www.exploit-db.com/exploits/48763'
    label: ExploitDB-48763
  - url: 'https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5586.php'
    label: Vulnerability Advisory
  - url: 'http://www.eibiz.co.th'
    label: Reference
  - url: >-
      https://www.vulncheck.com/advisories/eibiz-i-media-server-digital-signage-unauthenticated-user-creation-vulnerability
    label: >-
      VulnCheck Advisory: Eibiz i-Media Server Digital Signage 3.8.0
      Unauthenticated User Creation Vulnerability
tags:
  - cve.org
  - exploit-available
epss: 0.00798
epssPercentile: 0.54899
ingestedAt: '2026-10-01T15:48:17.879Z'
---

## Overview

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.

## Affected

- `i-media_server_digital_signage <= 3.8.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.