# CVE-2022-31065: Cross site scripting vulnerability for private chat in bigbluebutton

> Attackers can execute malicious JavaScript on victims' clients via crafted usernames in private chats or session notifications.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 27 Jun 2022
- **Updated:** 23 Apr 2025
- **Also known as:** GHSA-8m2p-7qv3-qff7

## What is CVE-2022-31065?

CVE-2022-31065 is a medium-severity cross-site scripting vulnerability in bigbluebutton, published on 27 Jun 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

BigBlueButton is an open source web conferencing system. In affected versions an attacker can embed malicious JS in their username and have it executed on the victim's client. When a user receives a private chat from the attacker (whose username contains malicious JavaScript), the script gets executed. Additionally when the victim receives a notification that the attacker has left the session. This issue has been patched in version 2.4.8 and 2.5.0. There are no known workarounds for this issue.

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

## Which versions are affected by CVE-2022-31065?

It affects 1 product.


Products: Bigbluebutton Bigbluebutton.

## How do I fix CVE-2022-31065?

No fix has been published for CVE-2022-31065 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-31065 being exploited?

There is no known exploitation of CVE-2022-31065 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-2022-31065 and fix it if it is affected.

What it is: CVE-2022-31065 is a medium-severity cross-site scripting vulnerability in bigbluebutton, published on 27 Jun 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2022-31065 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-2022-31065/ (Markdown: https://insights.sbomify.com/CVE-2022-31065/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-31065
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-31065
- OSV: https://osv.dev/vulnerability/CVE-2022-31065

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-31065/
Summaries are generated and may contain mistakes; the official description above is the record.