# CVE-2023-4157: Improper Neutralization of Special Elements in Output Used by a Downstream Component in omeka/omeka-s

> Attackers can inject malicious scripts into Omeka S, potentially executing code or stealing data from users.

- **Severity:** Medium 5.2 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 4 Aug 2023
- **Updated:** 9 Oct 2024
- **Also known as:** GHSA-fxc5-pr68-2px3

## What is CVE-2023-4157?

CVE-2023-4157 is a medium-severity cross-site scripting vulnerability in omeka/omeka-s, published on 4 Aug 2023. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in GitHub repository omeka/omeka-s prior to version 4.0.3.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2023-4157?

2 open source packages ship an affected version, including omeka/omeka-s. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `omeka/omeka-s` | Packagist | All versions | 4.0.3 |
| `omeka/omeka-s` | Packagist | All versions | 4.0.3 |

Products: Omeka Omeka S.

## How do I fix CVE-2023-4157?

Upgrade omeka/omeka-s to 4.0.3 or later.

## Is CVE-2023-4157 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-4157 exists.

## Other vulnerabilities in omeka/omeka-s

- [CVE-2023-4159](https://insights.sbomify.com/CVE-2023-4159/): Unrestricted Upload of File with Dangerous Type in omeka/omeka-s (critical 9.9)
- [CVE-2023-4561](https://insights.sbomify.com/CVE-2023-4561/): Cross-site Scripting (XSS) - Stored in omeka/omeka-s (high 7.1)
- [CVE-2023-4560](https://insights.sbomify.com/CVE-2023-4560/): Improper Authorization of Index Containing Sensitive Information in omeka/omeka-s (medium 6.5)
- [CVE-2023-4158](https://insights.sbomify.com/CVE-2023-4158/): Cross-site Scripting (XSS) - Stored in omeka/omeka-s (medium 6.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-4157 and fix it if it is affected.

What it is: CVE-2023-4157 is a medium-severity cross-site scripting vulnerability in omeka/omeka-s, published on 4 Aug 2023. An attacker needs administrator access to exploit it, 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-2023-4157 exists.

Affected packages and fixed versions:
- omeka/omeka-s (Packagist): affected all versions; fixed in 4.0.3
- omeka/omeka-s (Packagist): affected all versions; fixed in 4.0.3

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-2023-4157/ (Markdown: https://insights.sbomify.com/CVE-2023-4157/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-4157
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-4157
- OSV: https://osv.dev/vulnerability/CVE-2023-4157

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-4157/
Summaries are generated and may contain mistakes; the official description above is the record.