# CVE-2020-36892: Eibiz i-Media Server Digital Signage 3.8.0 Unauthenticated Privilege Escalation

> Unauthenticated attackers can escalate privileges and take over accounts by manipulating user roles via the AMF endpoint in Eibiz i-Media Server.

- **Severity:** Critical 9.3 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Dec 2025
- **Updated:** 1 Oct 2026
- **Also known as:** GHSA-gm58-7w8m-7hg4

## What is CVE-2020-36892?

CVE-2020-36892 is a critical vulnerability in EIBIZ Co.,Ltd. i-Media Server Digital Signage, published on 10 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

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.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2020-36892?

It affects 1 product.


Products: Eibiz I-Media Server Digital Signage.

## How do I fix CVE-2020-36892?

No fix has been published for CVE-2020-36892 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-36892 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36892 exists.

## Other vulnerabilities in EIBIZ Co.,Ltd. i-Media Server Digital Signage

- [CVE-2020-36894](https://insights.sbomify.com/CVE-2020-36894/): Eibiz i-Media Server Digital Signage 3.8.0 Unauthenticated User Creation Vulnerability (critical 9.3)
- [CVE-2020-36893](https://insights.sbomify.com/CVE-2020-36893/): Eibiz i-Media Server Digital Signage 3.8.0 Directory Traversal Vulnerability (high 8.7)
- [CVE-2020-36895](https://insights.sbomify.com/CVE-2020-36895/): EIBIZ i-Media Server Digital Signage 3.8.0 Unauthenticated Configuration Disclosure (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-36892 and fix it if it is affected.

What it is: CVE-2020-36892 is a critical vulnerability in EIBIZ Co.,Ltd. i-Media Server Digital Signage, published on 10 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36892 exists.

Affected product: EIBIZ Co.,Ltd. i-Media Server Digital Signage. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2020-36892/ (Markdown: https://insights.sbomify.com/CVE-2020-36892/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-36892
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-36892
- OSV: https://osv.dev/vulnerability/CVE-2020-36892

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-36892/
Summaries are generated and may contain mistakes; the official description above is the record.