How severe is CVE-2023-25574?

CVE-2023-25574 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-25574 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-25574?

CVE-2023-25574 affects Jupyter Lti Jupyterhub Authenticator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-25574?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2023-25574 have an EU (EUVD) identifier?

Yes. CVE-2023-25574 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-29521.

When was CVE-2023-25574 published?

CVE-2023-25574 was published on 2025-02-25 and last updated on 2026-06-17.

CVE-2023-25574

CVE-2023-25574 is a critical-severity vulnerability in Jupyter Lti Jupyterhub Authenticator with a CVSS 3.x base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-347.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-29521
Weakness: CWE-347
Affected product: Jupyter Lti Jupyterhub Authenticator
Published: 2025-02-25
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-25574?: `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.
How severe is CVE-2023-25574?: CVE-2023-25574 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-25574 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-25574?: CVE-2023-25574 affects Jupyter Lti Jupyterhub Authenticator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-25574?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2023-25574 have an EU (EUVD) identifier?: Yes. CVE-2023-25574 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-29521.
When was CVE-2023-25574 published?: CVE-2023-25574 was published on 2025-02-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jupyter:lti_jupyterhub_authenticator:1.3.0:*:*:*:*:*:*:*

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