# CVE-2022-41963: BigBlueButton contains Improper Preservation of Permissions for whiteboard

> Attackers can perform whiteboard actions after access revocation due to a grace period, requiring an upgrade to BigBlueButton.

- **Severity:** Low 2.7 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Dec 2022
- **Updated:** 17 Apr 2025
- **Also known as:** GHSA-v6p9-926c-6qfp

## What is CVE-2022-41963?

CVE-2022-41963 is a low-severity missing authorization vulnerability in bigbluebutton, published on 16 Dec 2022. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

BigBlueButton is an open source web conferencing system. Versions prior to 2.4.3 contain a whiteboard grace period that exists to handle delayed messages, but this grace period could be used by attackers to take actions in the few seconds after their access is revoked. The attacker must be a meeting participant. This issue is patched in version 2.4.3 an version 2.5-alpha-1

Weakness: CWE-281 (Improper Preservation of Permissions)

## Which versions are affected by CVE-2022-41963?

It affects 1 product.


Products: Bigbluebutton Bigbluebutton.

## How do I fix CVE-2022-41963?

No fix has been published for CVE-2022-41963 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-41963 being exploited?

There is no known exploitation of CVE-2022-41963 in the wild and no public exploit code.

## Other vulnerabilities in bigbluebutton

- [CVE-2020-27602](https://insights.sbomify.com/CVE-2020-27602/): Other in n/a (critical 9.8)
- [CVE-2020-27605](https://insights.sbomify.com/CVE-2020-27605/): Code injection in n/a (critical 9.8)
- [CVE-2020-12443](https://insights.sbomify.com/CVE-2020-12443/): Path traversal in n/a (critical 9.8)
- [CVE-2020-27613](https://insights.sbomify.com/CVE-2020-27613/): Hardcoded credentials in n/a (high 8.4)
- [CVE-2021-4143](https://insights.sbomify.com/CVE-2021-4143/): Cross-site Scripting (XSS) - Generic in bigbluebutton/bigbluebutton (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-41963 and fix it if it is affected.

What it is: CVE-2022-41963 is a low-severity missing authorization vulnerability in bigbluebutton, published on 16 Dec 2022. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-41963 in the wild and no public exploit code.

Affected product: bigbluebutton. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2022-41963/ (Markdown: https://insights.sbomify.com/CVE-2022-41963/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-41963
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-41963
- OSV: https://osv.dev/vulnerability/CVE-2022-41963

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-41963/
Summaries are generated and may contain mistakes; the official description above is the record.