CVE-2020-36894

Name: CVE-2020-36894
Creator: NVD / NIST
Published: 2025-12-10T21:16:01.743+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10EPSS 0.70%

Last modified Jun 17, 2026

CVE-2020-36894 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. 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.. EPSS estimates a 0.70% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

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

CVSS 4.0

9.3/10

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/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

EPSS Probability

0.70%

48.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-306

Affected Software

Vendor	Product	Versions
Eibiz	I-Media Server Digital Signage	3.8.0

References

http://www.eibiz.co.thBroken Link
https://www.exploit-db.com/exploits/48763Exploit, Third Party Advisory, VDB Entry
https://www.vulncheck.com/advisories/eibiz-i-media-server-digital-signage-unauthenticated-user-creation-vulnerabilityThird Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5586.phpExploit, Third Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5586.phpExploit, Third Party Advisory

Timeline

Published: Dec 10, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2020-36894?

How severe is CVE-2020-36894?

CVE-2020-36894 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 0.70% probability of exploitation in the next 30 days.

How do I fix CVE-2020-36894?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-36894?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST