---
title: "CVE-2025-32428: TigerVNC accessible via the network and not just via a UNIX socket as intended"
url: https://erroneo.us/security/cve/CVE-2025-32428/
description: "CVE-2025-32428 (jupyter-remote-desktop-proxy (PyPI)): Jupyter Remote Desktop Proxy allows you to run a Linux Desktop on a JupyterHub.…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-04-14
date_modified: 2025-04-15
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-32428"
kev: false
cvss: 9
epss: 0.00916
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-32428: TigerVNC accessible via the network and not just via a UNIX socket as intended

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.9% , percentile 60: FIRST’s model estimates a 0.9% chance of exploitation activity in the next 30 days, higher than 60% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Only applies if your dependency tree includes jupyter-remote-desktop-proxy (PyPI) = 3.0.0, fixed in 3.0.1 . Check your lockfile, including transitive dependencies.

## What it is

Jupyter Remote Desktop Proxy allows you to run a Linux Desktop on a JupyterHub. jupyter-remote-desktop-proxy was meant to rely on UNIX sockets readable only by the current user since version 3.0.0, but when used with TigerVNC, the VNC server started by jupyter-remote-desktop-proxy were still accessible via the network. This vulnerability does not affect users having TurboVNC as the vncserver executable. This issue is fixed in 3.0.1.

## Affected packages

- PyPI `jupyter-remote-desktop-proxy` = 3.0.0 → fixed: 3.0.1

## Affected products (CVE record)

- jupyterhub jupyter-remote-desktop-proxy: >= 3.0.0, < 3.0.1

## Severity

- GitHub_M CVSS 4.0: 9 `CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`
- GitHub CVSS 4.0: 9.0 `CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.92% probability of exploitation activity in the next 30 days; percentile 60.

## Sources

- [GitHub Advisory GHSA-vrq4-9hc3-cgp7](https://github.com/advisories/GHSA-vrq4-9hc3-cgp7)
- [CVE.org record CVE-2025-32428](https://www.cve.org/CVERecord?id=CVE-2025-32428)
- [NVD entry CVE-2025-32428](https://nvd.nist.gov/vuln/detail/CVE-2025-32428)
- [github.com](https://github.com/jupyterhub/jupyter-remote-desktop-proxy/security/advisories/GHSA-vrq4-9hc3-cgp7)
- [github.com](https://github.com/jupyterhub/jupyter-remote-desktop-proxy/commit/7dd54c25a4253badd8ea68895437e5a66a59090d)

---
Source page: https://erroneo.us/security/cve/CVE-2025-32428/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt