# CVE-2017-20063: Elefant CMS File Upload drop privileges management

> Remote attackers can exploit improper privilege management in the file upload feature to escalate privileges and potentially execute code.

- **Severity:** Medium 6.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 20 Jun 2022
- **Updated:** 15 Apr 2025
- **Also known as:** GHSA-mwh6-g9wx-xcx3

## What is CVE-2017-20063?

CVE-2017-20063 is a medium-severity vulnerability in Elefant CMS, published on 20 Jun 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was found in Elefant CMS 1.3.12-RC. It has been classified as critical. Affected is an unknown function of the file /filemanager/upload/drop of the component File Upload. The manipulation leads to improper privilege management. It is possible to launch the attack remotely. Upgrading to version 1.3.13 is able to address this issue. It is recommended to upgrade the affected component.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type), CWE-269 (Improper Privilege Management)

## Which versions are affected by CVE-2017-20063?

2 open source packages ship an affected version, including elefant/cms. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `elefant/cms` | Packagist | All versions | 1.3.13 |
| `elefant/cms` | Packagist | All versions | 1.3.13 |

Products: Elefantcms Elefant Cms.

## How do I fix CVE-2017-20063?

Upgrade elefant/cms to 1.3.13 or later.

## Is CVE-2017-20063 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-20063 exists.

## Other vulnerabilities in Elefant CMS

- [CVE-2017-20064](https://insights.sbomify.com/CVE-2017-20064/): Elefant CMS layout code injection (medium 6.3)
- [CVE-2017-20062](https://insights.sbomify.com/CVE-2017-20062/): Elefant CMS cross-site request forgery (medium 5.0)
- [CVE-2017-20057](https://insights.sbomify.com/CVE-2017-20057/): Elefant CMS Persistent cross site scriting (medium 4.3)
- [CVE-2017-20061](https://insights.sbomify.com/CVE-2017-20061/): Elefant CMS extended Reflected cross site scriting (medium 4.3)
- [CVE-2017-20059](https://insights.sbomify.com/CVE-2017-20059/): Elefant CMS Title Persistent cross site scriting (low 3.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-20063 and fix it if it is affected.

What it is: CVE-2017-20063 is a medium-severity vulnerability in Elefant CMS, published on 20 Jun 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-20063 exists.

Affected packages and fixed versions:
- elefant/cms (Packagist): affected all versions; fixed in 1.3.13
- elefant/cms (Packagist): affected all versions; fixed in 1.3.13

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-2017-20063/ (Markdown: https://insights.sbomify.com/CVE-2017-20063/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-20063
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-20063
- OSV: https://osv.dev/vulnerability/CVE-2017-20063

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-20063/
Summaries are generated and may contain mistakes; the official description above is the record.