CVE-2020-36894CWE-306

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

Critical · published December 10, 2025

CVSS v4.0
9.3
EPSS
1%
Percentile
56.0
In the wild
Unconfirmed
What it is

🚨 An unauthenticated attack allows the creation of admin users in Eibiz i-Media Server! That's like leaving the keys to the kingdom under a welcome mat, waiting for anyone to stroll right in. 🔥 Think of the AMF-encoded object manipulation as a sneaky mailman who can forge letters to get a VIP pass without anyone checking their ID. This flaw lets attackers create admin accounts simply by delivering the right crafted messages to the server's doorstep. With this vulnerability, an attacker could gain full control over the system, turning them into a rogue admin who can tamper with settings, access sensitive data, and disrupt services at will. The potential for chaos is absolutely devastating—think unauthorized changes and complete system compromise!

Put simply

Think of the AMF-encoded object manipulation as a sneaky mailman who can forge letters to get a VIP pass without anyone checking their ID. This flaw lets attackers create admin accounts simply by delivering the right crafted messages to the server's doorstep. This vulnerability allows unauthenticated users to manipulate serialized objects sent to the /messagebroker/amf endpoint. By bypassing authentication checks, attackers can create new administrative users and gain elevated access to the system.

What to do

With this vulnerability, an attacker could gain full control over the system, turning them into a rogue admin who can tamper with settings, access sensitive data, and disrupt services at will. The potential for chaos is absolutely devastating—think unauthorized changes and complete system compromise! Immediately update your Eibiz i-Media Server to version 3.8.1 or later to patch this critical flaw. Additionally, review your server’s configurations to ensure proper authentication checks are in place to prevent similar issues. Don't wait, protect your systems now! You've got this! Take these actions, and you'll close the door on this vulnerability in no time. 🛡️

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
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
EPSS
0.00798 · 56.0th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2025-12-10T20:53Z
EPSS history
Timeline
  • 10 DEC 20:53Z
    Eibiz i-Media Server Digital Signage 3.8.0 Unauthenticated User Creation Vulnerability
    cvelistv5