CVE-2024-29033: oauthenticator Access Control Flaw

Description

OAuthenticator provides plugins for JupyterHub to use common OAuth providers, as well as base classes for writing one's own Authenticators with any OAuth 2.0 provider. `GoogleOAuthenticator.hosted_domain` is used to restrict what Google accounts can be authorized access to a JupyterHub. The restriction is intented to be to Google accounts part of one or more Google organization verified to control specified domain(s). Prior to version 16.3.0, the actual restriction has been to Google accounts with emails ending with the domain. Such accounts could have been created by anyone which at one time was able to read an email associated with the domain. This was described by Dylan Ayrey (@dxa4481) in this [blog post] from 15th December 2023). OAuthenticator 16.3.0 contains a patch for this issue. As a workaround, restrict who can login another way, such as `allowed_users` or `allowed_google_groups`.

Is your site exposed to CVE-2024-29033?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness Type (CWE)

CWE-285 CWE-285

Affected Products

Vendor	Product	Versions
jupyter	oauthenticator	< 16.3.0

References

Advisories & Patches

https://github.com/jupyterhub/oauthenticator/commit/5246b09675501b09fb6ed64022099b7644812f60 https://github.com/jupyterhub/oauthenticator/security/advisories/GHSA-55m3-44xf-hg4h https://github.com/jupyterhub/oauthenticator/commit/5246b09675501b09fb6ed64022099b7644812f60 https://github.com/jupyterhub/oauthenticator/security/advisories/GHSA-55m3-44xf-hg4h

Other References

https://trufflesecurity.com/blog/google-oauth-is-broken-sort-of https://trufflesecurity.com/blog/google-oauth-is-broken-sort-of

Frequently Asked Questions

What is CVE-2024-29033? +

OAuthenticator provides plugins for JupyterHub to use common OAuth providers, as well as base classes for writing one's own Authenticators with any OAuth 2.0 provider. `GoogleOAuthenticator.hosted_domain` is used to restrict what Google accounts can be authorized access to a JupyterHub. The restriction is intented to be to Google accounts part of one or more Google organization verified to control specified domain(s). Prior to version 16.3.0, the actual restriction has been to Google accounts with emails ending with the domain. Such accounts could have been created by anyone which at one time was able to read an email associated with the domain. This was described by Dylan Ayrey (@dxa4481) in this [blog post] from 15th December 2023). OAuthenticator 16.3.0 contains a patch for this issue. As a workaround, restrict who can login another way, such as `allowed_users` or `allowed_google_groups`. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-29033? +

CVE-2024-29033 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-29033? +

CVE-2024-29033 affects products from jupyter, specifically: oauthenticator. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-29033? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-33398

NamelessMC is website software for Minecraft servers. In version 2.2.4, `modules/Forum/pages/forum/get_quotes.php` only checks whether the caller is logged in, then …

CVE-2025-3013

Insecure Direct Object References (IDOR) in access control in Customer Portal before 2.1.4 on NightWolf Penetration Testing allows an attacker …

CVE-2025-3014

Insecure Direct Object References (IDOR) in access control in Tracking 2.1.4 on NightWolf Penetration Testing allows an attacker to access …

CVE-2025-27509

fleetdm/fleet is an open source device management, built on osquery. In vulnerable versions of Fleet, an attacker could craft a …

CVE-2024-26291

An Unauthenticated Arbitrary File Read vulnerability affects the Agent when installed on a system. The parameter filename does not validate …

CVE-2025-49594

XWiki OIDC has various tools to manipulate OpenID Connect protocol in XWiki. Starting in version 2.17.1 and prior to version …

CVE-2024-29033