# CVE-2023-5543: Moodle: duplicating a bigbluebutton activity assigns the same meeting id

> Duplicating a BigBlueButton activity in Moodle reuses the original meeting ID, allowing unauthorized access to the original meeting.

- **Severity:** Low 3.3 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/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:** 2 Aug 2024
- **Also known as:** BIT-moodle-2023-5543, GHSA-p657-7739-2grh, UBUNTU-CVE-2023-5543

## What is CVE-2023-5543?

CVE-2023-5543 is a low-severity missing authorization vulnerability in Fedoraproject Extra Packages for Enterprise Linux, 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

When duplicating a BigBlueButton activity, the original meeting ID was also duplicated instead of using a new ID for the new activity. This could provide unintended access to the original meeting.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2023-5543?

1 open source package ship an affected version, including moodle. It affects 3 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `moodle` | Bitnami | From 4.0.0 | 4.0.11, 4.1.6, 4.2.3 |

Products: Fedoraproject Extra Packages for Enterprise Linux, Fedoraproject Fedora, Moodle Moodle.

## How do I fix CVE-2023-5543?

Upgrade moodle to a fixed version for your release line: 4.0.11, 4.1.6 or 4.2.3.

## Is CVE-2023-5543 being exploited?

There is no known exploitation of CVE-2023-5543 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Extra Packages for Enterprise Linux

- [CVE-2023-34152](https://insights.sbomify.com/CVE-2023-34152/): Command injection in ImageMagick (critical 9.8)
- [CVE-2022-4170](https://insights.sbomify.com/CVE-2022-4170/): Code injection in rxvt-unicode (critical 9.8)
- [CVE-2022-40315](https://insights.sbomify.com/CVE-2022-40315/): Moodle Minor SQL injection risk in admin user browsing (critical 9.8)
- [CVE-2022-45152](https://insights.sbomify.com/CVE-2022-45152/): Moodle blind Server-Side Request Forgery (SSRF) vulnerability in LTI provider library (critical 9.1)
- [CVE-2022-24882](https://insights.sbomify.com/CVE-2022-24882/): Server side NTLM does not properly check parameters in FreeRDP (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-5543 and fix it if it is affected.

What it is: CVE-2023-5543 is a low-severity missing authorization vulnerability in Fedoraproject Extra Packages for Enterprise Linux, 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-2023-5543 in the wild and no public exploit code.

Affected packages and fixed versions:
- moodle (Bitnami): affected from 4.0.0; fixed in 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-2023-5543/ (Markdown: https://insights.sbomify.com/CVE-2023-5543/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-5543
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-5543
- OSV: https://osv.dev/vulnerability/CVE-2023-5543

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-5543/
Summaries are generated and may contain mistakes; the official description above is the record.