What’s Vulnerable › Vulnerabilities

CVE-2024-28233: XSS in JupyterHub via Self-XSS leveraged by Cookie Tossing

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-03-27 · updated 2026-06-17
• Weakness: CWE-79

Description

JupyterHub is an open source multi-user server for Jupyter notebooks. By tricking a user into visiting a malicious subdomain, the attacker can achieve an XSS directly affecting the former's session. More precisely, in the context of JupyterHub, this XSS could achieve full access to JupyterHub API and user's single-user server. The affected configurations are single-origin JupyterHub deployments and JupyterHub deployments with user-controlled applications running on subdomains or peer subdomains of either the Hub or a single-user server. This vulnerability is fixed in 4.1.0.

Affected products

• jupyterhub: before 4.1.0 — fixed in 4.1.0

How to fix

Upgrade to a fixed version: jupyterhub 4.1.0. Check the vendor advisory for mitigations.

References

• https://github.com/jupyterhub/jupyterhub/commit/e2798a088f5ad45340fe79cdf1386198e664f77f
• https://github.com/jupyterhub/jupyterhub/security/advisories/GHSA-7r3h-4ph8-w38g
• https://github.com/jupyterhub/jupyterhub/commit/e2798a088f5ad45340fe79cdf1386198e664f77f
• https://github.com/jupyterhub/jupyterhub/security/advisories/GHSA-7r3h-4ph8-w38g

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