# CVE-2022-29234: Grace period for lock settings in public/private chats in BigBlueButton

> Participants can bypass chat locks and send messages during a brief grace period after lock settings change in BigBlueButton meetings.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Jun 2022
- **Updated:** 23 Apr 2025
- **Also known as:** GHSA-36vc-c338-6xjv

## What is CVE-2022-29234?

CVE-2022-29234 is a medium-severity missing authorization vulnerability in bigbluebutton, published on 1 Jun 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

BigBlueButton is an open source web conferencing system. Starting in version 2.2 and prior to versions 2.3.18 and 2.4.1, an attacker could send messages to a locked chat within a grace period of 5s any lock setting in the meeting was changed. The attacker needs to be a participant in the meeting. Versions 2.3.18 and 2.4.1 contain a patch for this issue. There are currently no known workarounds.

Weakness: CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2022-29234?

It affects 1 product.


Products: Bigbluebutton Bigbluebutton.

## How do I fix CVE-2022-29234?

No fix has been published for CVE-2022-29234 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-29234 being exploited?

There is no known exploitation of CVE-2022-29234 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-2022-29234 and fix it if it is affected.

What it is: CVE-2022-29234 is a medium-severity missing authorization vulnerability in bigbluebutton, published on 1 Jun 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-29234 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-2022-29234/ (Markdown: https://insights.sbomify.com/CVE-2022-29234/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-29234
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-29234
- OSV: https://osv.dev/vulnerability/CVE-2022-29234

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-29234/
Summaries are generated and may contain mistakes; the official description above is the record.