# CVE-2022-31064: Cross site scripting in username that will trigger by sending chat

> Attackers can execute arbitrary JavaScript in victims' browsers via malicious usernames in private chats, potentially leading to session hijacking or data theft.

- **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:** 22 Apr 2025
- **Also known as:** GHSA-hwv2-5pf5-hr87

## What is CVE-2022-31064?

CVE-2022-31064 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. Users in meetings with private chat enabled are vulnerable to a cross site scripting attack in affected versions. The attack occurs when the attacker (with xss in the name) starts a chat. in the victim's client the JavaScript will be executed. This issue has been addressed 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-2022-31064?

It affects 1 product.


Products: Bigbluebutton Bigbluebutton.

## How do I fix CVE-2022-31064?

No fix has been published for CVE-2022-31064 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-31064 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-31064 exists.

## 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-2022-31064 and fix it if it is affected.

What it is: CVE-2022-31064 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-31064 exists.

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-2022-31064/ (Markdown: https://insights.sbomify.com/CVE-2022-31064/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-31064
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-31064
- OSV: https://osv.dev/vulnerability/CVE-2022-31064

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-31064/
Summaries are generated and may contain mistakes; the official description above is the record.