CVE-2020-36894: Eibiz i-Media Server Digital Signage 3.8.0 contains an authentication bypass vulnerability that allows unauthe

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2020-36894 is a high-severity flaw (CVSS 7.5) 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 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.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 44%)
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.

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-2020-36894?

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

Is CVE-2020-36894 being exploited?

CVE-2020-36894 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-2020-36894 affect?

CVE-2020-36894 affects i-media server digital signage. Severity is high (CVSS 7.5). 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

How urgent is CVE-2020-36894?

Priority 50/100. High severity; Public exploit reference; 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-2020-36893 HIGH 7.5 DOWNGRADE Eibiz i-Media Server Digital Signage 3.8.0 contains a directory traversal vulnerability that allows unauthenti
CVE-2020-36892 CRITICAL 9.8 DOWNGRADE Eibiz i-Media Server Digital Signage 3.8.0 contains an unauthenticated privilege escalation vulnerability in t

References

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