# CVE-2023-5547: Moodle: xss risk when previewing data in course upload tool

> An attacker can execute arbitrary scripts in the Moodle course upload preview, potentially compromising user accounts.

- **Severity:** Low 3.3 (`CVSS:3.1/AV:L/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:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 9 Nov 2023
- **Updated:** 4 Sep 2024
- **Also known as:** BIT-moodle-2023-5547, GHSA-9gqp-3g28-w9xc, UBUNTU-CVE-2023-5547

## What is CVE-2023-5547?

CVE-2023-5547 is a low-severity cross-site scripting vulnerability in Fedoraproject Fedora, published on 9 Nov 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

The course upload preview contained an XSS risk for users uploading unsafe data.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2023-5547?

3 open source packages ship an affected version, including moodle/moodle and moodle. It affects 3 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `moodle/moodle` | Packagist | All versions | 4.3.0-rc2 |
| `moodle/moodle` | Packagist | All versions | 4.3.0-rc2 |
| `moodle` | Bitnami | From 3.9.0 | 3.9.24, 3.11.17, 4.0.11, 4.1.6, 4.2.3 |

Products: Fedoraproject Fedora, Moodle Moodle, Redhat Enterprise Linux.

## How do I fix CVE-2023-5547?

Upgrade moodle/moodle to 4.3.0-rc2 or later.

## Is CVE-2023-5547 being exploited?

There is no known exploitation of CVE-2023-5547 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-5547 and fix it if it is affected.

What it is: CVE-2023-5547 is a low-severity cross-site scripting vulnerability in Fedoraproject Fedora, published on 9 Nov 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-5547 in the wild and no public exploit code.

Affected packages and fixed versions:
- moodle/moodle (Packagist): affected all versions; fixed in 4.3.0-rc2
- moodle/moodle (Packagist): affected all versions; fixed in 4.3.0-rc2
- moodle (Bitnami): affected from 3.9.0; fixed in 3.9.24, 3.11.17, 4.0.11, 4.1.6, 4.2.3

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-2023-5547/ (Markdown: https://insights.sbomify.com/CVE-2023-5547/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-5547
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-5547
- OSV: https://osv.dev/vulnerability/CVE-2023-5547

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-5547/
Summaries are generated and may contain mistakes; the official description above is the record.