# CVE-2022-26497: Cross-site scripting in n/a

> Attackers can execute arbitrary JavaScript in victims' browsers via malicious usernames in the share room dialog, potentially leading to session hijacking.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **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:** 2 Jun 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-w3cv-3c36-h8j2

## What is CVE-2022-26497?

CVE-2022-26497 is a medium-severity cross-site scripting vulnerability in n/a, published on 2 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 Greenlight 2.11.1 allows XSS. A threat actor could have a username containing a JavaScript payload. The payload gets executed in the browser of the victim in the "Share room access" dialog if the victim has shared access to the particular room with the attacker previously.

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

## Which versions are affected by CVE-2022-26497?

It affects 1 product.


Products: Bigbluebutton Greenlight.

## How do I fix CVE-2022-26497?

No fix has been published for CVE-2022-26497 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-26497 being exploited?

There is no known exploitation of CVE-2022-26497 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2022-36028](https://insights.sbomify.com/CVE-2022-36028/): BigBlueButton Greenlight Open Redirect vulnerability (critical 9.1)
- [CVE-2022-36029](https://insights.sbomify.com/CVE-2022-36029/): BigBlueButton Greenlight Open Redirect vulnerability (critical 9.1)
- [CVE-2020-26163](https://insights.sbomify.com/CVE-2020-26163/): Open redirect in n/a (high 8.8)
- [CVE-2020-27642](https://insights.sbomify.com/CVE-2020-27642/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2022-31039](https://insights.sbomify.com/CVE-2022-31039/): Improper privilege management - Anyone can view room settings in GreenLight (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-26497 and fix it if it is affected.

What it is: CVE-2022-26497 is a medium-severity cross-site scripting vulnerability in n/a, published on 2 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-2022-26497 in the wild and no public exploit code.

Affected product: n/a. 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-2022-26497/ (Markdown: https://insights.sbomify.com/CVE-2022-26497/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-26497
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-26497
- OSV: https://osv.dev/vulnerability/CVE-2022-26497

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-26497/
Summaries are generated and may contain mistakes; the official description above is the record.