# CVE-2020-36900: All-Dynamics Digital Signage System 2.0.2 Cross-Site Request Forgery via User Management

> Attackers can create administrative users via CSRF, leading to privilege escalation and account takeover in the Digital Signage System.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 10 Dec 2025
- **Updated:** 11 Dec 2025
- **Also known as:** GHSA-j79x-r5jm-qcmw

## What is CVE-2020-36900?

CVE-2020-36900 is a high-severity vulnerability in All-Dynamics Software GmbH Digital Signage System, published on 10 Dec 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

All-Dynamics Digital Signage System 2.0.2 contains a cross-site request forgery vulnerability that allows attackers to create administrative users without proper request validation. Attackers can craft a malicious web page that automatically submits forms to create a new user with global administrative privileges when a logged-in user visits the page.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2020-36900?

It affects 1 product.


Products: All-Dynamics Digital Signage System.

## How do I fix CVE-2020-36900?

No fix has been published for CVE-2020-36900 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-36900 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36900 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-36900 and fix it if it is affected.

What it is: CVE-2020-36900 is a high-severity vulnerability in All-Dynamics Software GmbH Digital Signage System, published on 10 Dec 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36900 exists.

Affected product: All-Dynamics Software GmbH Digital Signage System. 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-2020-36900/ (Markdown: https://insights.sbomify.com/CVE-2020-36900/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-36900
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-36900
- OSV: https://osv.dev/vulnerability/CVE-2020-36900

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-36900/
Summaries are generated and may contain mistakes; the official description above is the record.