# CVE-2023-30856: eDEX-UI cross-site websocket hijacking vulnerability enables remote command execution

> A malicious website can hijack the internal websocket to execute arbitrary shell commands on the user's machine.

- **Severity:** High 8.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Apr 2023
- **Updated:** 30 Jan 2025
- **Also known as:** GHSA-q8xc-f2wf-ffh9

## What is CVE-2023-30856?

CVE-2023-30856 is a high-severity vulnerability in GitSquared edex-ui, published on 28 Apr 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

eDEX-UI is a science fiction terminal emulator. Versions 2.2.8 and prior are vulnerable to cross-site websocket hijacking. When running eDEX-UI and browsing the web, a malicious website can connect to eDEX's internal terminal control websocket, and send arbitrary commands to the shell. The project has been archived since 2021, and as of time of publication there are no plans to patch this issue and release a new version. Some workarounds are available, including shutting down eDEX-UI when browsing the web and ensuring the eDEX terminal runs with lowest possible privileges.

Weakness: CWE-346 (Origin Validation Error), CWE-1385 (Missing Origin Validation in WebSockets)

## Which versions are affected by CVE-2023-30856?

It affects 1 product.


Products: Edex-Ui Project Edex-Ui.

## How do I fix CVE-2023-30856?

No fix has been published for CVE-2023-30856 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-30856 being exploited?

There is no known exploitation of CVE-2023-30856 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-30856 and fix it if it is affected.

What it is: CVE-2023-30856 is a high-severity vulnerability in GitSquared edex-ui, published on 28 Apr 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-30856 in the wild and no public exploit code.

Affected product: GitSquared edex-ui. 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-2023-30856/ (Markdown: https://insights.sbomify.com/CVE-2023-30856/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-30856
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-30856
- OSV: https://osv.dev/vulnerability/CVE-2023-30856

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-30856/
Summaries are generated and may contain mistakes; the official description above is the record.