# CVE-2017-20057: Elefant CMS Persistent cross site scriting

> Attackers can inject persistent scripts via the username field in Elefant CMS, potentially leading to session hijacking or malicious actions.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A: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:** Yes
- **Published:** 20 Jun 2022
- **Updated:** 15 Apr 2025
- **Also known as:** GHSA-xwj7-29j7-rw76

## What is CVE-2017-20057?

CVE-2017-20057 is a medium-severity cross-site scripting vulnerability in Elefant CMS, published on 20 Jun 2022. 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

A vulnerability classified as problematic has been found in Elefant CMS 1.3.12-RC. Affected is an unknown function. The manipulation of the argument username leads to basic cross site scripting (Persistent). 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-79 (Improper Neutralization of Input During Web Page Generation), CWE-80 (Improper Neutralization of Script-Related HTML Tags in a Web Page)

## Which versions are affected by CVE-2017-20057?

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-2017-20057?

Upgrade elefant/cms to 1.3.13 or later.

## Is CVE-2017-20057 being exploited?

There is no known exploitation of CVE-2017-20057 in the wild and no public exploit code.

## Other vulnerabilities in Elefant CMS

- [CVE-2017-20063](https://insights.sbomify.com/CVE-2017-20063/): Elefant CMS File Upload drop privileges management (medium 6.3)
- [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-2017-20061](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-2017-20057 and fix it if it is affected.

What it is: CVE-2017-20057 is a medium-severity cross-site scripting vulnerability in Elefant CMS, published on 20 Jun 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2017-20057 in the wild and no public exploit code.

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-2017-20057/ (Markdown: https://insights.sbomify.com/CVE-2017-20057/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-20057
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-20057
- OSV: https://osv.dev/vulnerability/CVE-2017-20057

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-20057/
Summaries are generated and may contain mistakes; the official description above is the record.