CVE-2020-36894

Eibiz i-Media Server Digital Signage 3.8.0 Unauthenticated User Creation Vulnerability

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

EIBIZ Co.,Ltd. · i-Media Server Digital Signage

CVSS v4.0 VULNCHECK

9.3 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 NVD

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS

0.80% chance of exploitation in the next 30 days, 56th percentile

Published

2025-12-10

Updated

2026-10-01

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/48763

Security advisories

• https://www.vulncheck.com/advisories/eibiz-i-media-server-digital-signage-unauthenticated…
• https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5586.php

References

• CVE Record
• NVD entry