# CVE-2020-23128: Privilege escalation in n/a

> A Sessions administrator in Chamilo LMS can escalate privileges to full administrator by creating and editing a new user.

- **Severity:** Medium 4.9 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 May 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-3jh7-8c9c-w8mx

## What is CVE-2020-23128?

CVE-2020-23128 is a medium-severity vulnerability in Chamilo Chamilo Lms, published on 5 May 2021. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Chamilo LMS 1.11.10 does not properly manage privileges which could allow a user with Sessions administrator privilege to create a new user then use the edit user function to change this new user to administrator privilege.

Weakness: CWE-269 (Improper Privilege Management)

## Which versions are affected by CVE-2020-23128?

It affects 1 product.


Products: Chamilo Chamilo Lms.

## How do I fix CVE-2020-23128?

No fix has been published for CVE-2020-23128 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-23128 being exploited?

There is no known exploitation of CVE-2020-23128 in the wild and no public exploit code.

## Other vulnerabilities in Chamilo Chamilo Lms

- [CVE-2025-50187](https://insights.sbomify.com/CVE-2025-50187/): Chamilo: Evaluation of untrusted user input leads to Remote Code Execution (critical 9.8)
- [CVE-2023-34944](https://insights.sbomify.com/CVE-2023-34944/): File upload in n/a (critical 9.8)
- [CVE-2022-27423](https://insights.sbomify.com/CVE-2022-27423/): SQL injection in n/a (critical 9.8)
- [CVE-2021-35414](https://insights.sbomify.com/CVE-2021-35414/): SQL injection in n/a (critical 9.8)
- [CVE-2019-13082](https://insights.sbomify.com/CVE-2019-13082/): File upload in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-23128 and fix it if it is affected.

What it is: CVE-2020-23128 is a medium-severity vulnerability in Chamilo Chamilo Lms, published on 5 May 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-23128 in the wild and no public exploit code.

Affected product: Chamilo Chamilo Lms. 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-2020-23128/ (Markdown: https://insights.sbomify.com/CVE-2020-23128/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-23128
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-23128
- OSV: https://osv.dev/vulnerability/CVE-2020-23128

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-23128/
Summaries are generated and may contain mistakes; the official description above is the record.