CVE-2020-36892: Eibiz i-Media Server Digital Signage 3.8.0 contains an unauthenticated privilege escalation vulnerability in t

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-36892 is a critical-severity flaw (CVSS 9.8) affecting i-media server digital signage. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Eibiz i-Media Server Digital Signage 3.8.0 contains an unauthenticated privilege escalation vulnerability in the updateUser object that allows attackers to modify user roles. Attackers can exploit the /messagebroker/amf endpoint to elevate privileges and take over user accounts by manipulating role settings without authentication.

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 36%)
CISA exploited list	No
Weakness	CWE-306
Published	2025-12-10
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: eibiz

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-10 21:16 UTCPublished CVE record published
2026-06-17 03:16 UTCUpdated Record last modified

eibiz i-media server digital signage DOWNGRADE

Affected: 3.8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.8.0

1. Check installed version

apt-cache policy i-media-server-digital-signage || rpm -q i-media-server-digital-signage || i-media-server-digital-signage --version

2. No fixed release: DOWNGRADE to a release before 3.8.0 (Debian / Ubuntu)

apt-cache madison i-media-server-digital-signage sudo apt install i-media-server-digital-signage=<VERSION_BEFORE_3.8.0> sudo apt-mark hold i-media-server-digital-signage

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list i-media-server-digital-signage sudo dnf downgrade i-media-server-digital-signage-<VERSION_BEFORE_3.8.0> sudo dnf versionlock add i-media-server-digital-signage

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · legofy · FIXED · 1.0.0-43.20261028git6913585.fc46 · FEDORA-2026-e1e60e1e32 · source

sudo dnf upgrade --advisory=FEDORA-2026-e1e60e1e32

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: www.exploit-db.com/exploits/48774
Write-up: www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5584.php

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-36892?

i-media server digital signage: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-36892 being exploited?

CVE-2020-36892 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-36892 affect?

CVE-2020-36892 affects i-media server digital signage. Severity is critical (CVSS 9.8). Eibiz i-Media Server Digital Signage 3.8.0 contains an unauthenticated privilege escalation vulnerability in the updateUser object that allows attackers to modify user roles. Attackers can exploit the /messagebroker/amf endpoint to elevate

How urgent is CVE-2020-36892?

Priority 63/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-36895 HIGH 7.5 DOWNGRADE EIBIZ i-Media Server Digital Signage 3.8.0 contains an unauthenticated configuration disclosure vulnerability
CVE-2020-36894 HIGH 7.5 DOWNGRADE Eibiz i-Media Server Digital Signage 3.8.0 contains an authentication bypass vulnerability that allows unauthe
CVE-2020-36893 HIGH 7.5 DOWNGRADE Eibiz i-Media Server Digital Signage 3.8.0 contains a directory traversal vulnerability that allows unauthenti

References

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