CVE-2023-25574

JupyterHub's LTI13Authenticator: JWT signature not validated

Published: Feb 25, 2025Updated: Sep 2, 2025 Sources: CVE List NVD GHSA BDUCWE-347

10.0CRITICAL

Description

`jupyterhub-ltiauthenticator` is a JupyterHub authenticator for learning tools interoperability (LTI). LTI13Authenticator that was introduced in `jupyterhub-ltiauthenticator` 1.3.0 wasn't validating JWT signatures. This is believed to allow the LTI13Authenticator to authorize a forged request. Only users that has configured a JupyterHub installation to use the authenticator class `LTI13Authenticator` are affected. `jupyterhub-ltiauthenticator` version 1.4.0 removes LTI13Authenticator to address the issue. No known workarounds are available.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:CScope

Changed

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-347

Affected Products

jupyter

oss-projectaka notebook, jupyterlab, jupyter server

lti jupyterhub authenticatorOn-prem

AI / ML / notebook-mlops

PyPI

package-ecosystem

jupyterhub-ltiauthenticator

OSS Libraries

Сообщество свободного программного обеспечения

oss-projectaka fsf

jupyterhub-ltiauthenticatorLibraryLibrary

OSS Libraries / generic-library

jupyterhub

oss-projectaka oauthenticator, jupyter-server-proxy

ltiauthenticatorOn-prem

AI / ML / notebook-mlops

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Collection

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References

https://github.com/jupyterhub/ltiauthenticator/blob/3feec2e81b9d3b0ad6b58ab4226af640833039f3/ltiauthenticator/lti13/validator.py#L122-L164

github.com

https://github.com/jupyterhub/ltiauthenticator/blob/main/CHANGELOG.md#140---2023-03-01

github.com

https://github.com/jupyterhub/ltiauthenticator/security/advisories/GHSA-mcgx-2gcr-p3hp

github.com

and 3 more references View all →

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