# CVE-2020-36902: UBICOD Medivision Digital Signage 1.5.1 Authorization Bypass via User Privileges

> Attackers can escalate privileges to super admin by manipulating a parameter in a GET request, allowing unauthorized control of the digital signage system.

- **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:** 11 Dec 2025
- **Also known as:** GHSA-j4gw-33j8-8f5j

## What is CVE-2020-36902?

CVE-2020-36902 is a critical vulnerability in UBICOD Medivision 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

UBICOD Medivision Digital Signage 1.5.1 contains an authorization bypass vulnerability that allows normal users to escalate privileges by manipulating the 'ft[grp]' parameter. Attackers can send a GET request to /html/user with 'ft[grp]' set to integer value '3' to gain super admin rights without authentication.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2020-36902?

It affects 1 product.


Products: Medivision Medivision Digital Signage Firmware.

## How do I fix CVE-2020-36902?

No fix has been published for CVE-2020-36902 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-36902 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36902 exists.

## Other vulnerabilities in UBICOD Medivision Digital Signage

- [CVE-2020-36901](https://insights.sbomify.com/CVE-2020-36901/): UBICOD Medivision Digital Signage 1.5.1 Cross-Site Request Forgery via User Management (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-36902 and fix it if it is affected.

What it is: CVE-2020-36902 is a critical vulnerability in UBICOD Medivision 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-2020-36902 exists.

Affected product: UBICOD Medivision 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-2020-36902/ (Markdown: https://insights.sbomify.com/CVE-2020-36902/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-36902
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-36902
- OSV: https://osv.dev/vulnerability/CVE-2020-36902

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-36902/
Summaries are generated and may contain mistakes; the official description above is the record.