CVE-2023-25574 json
JupyterHub's LTI13Authenticator: JWT signature not validated
published 2025-02-25 20 mo ago modified 2026-06-17 4 mo ago also GHSA-mcgx-2gcr-p3hp , PYSEC-2025-120 , EUVD-2023-29521
- cvss
- 10.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 29%
- public exploits
- 0
- none known
Summary
`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.
Patch / fix
- pypi jupyterhub-ltiauthenticator 1.4.0
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 20 mo ago
Exploit prediction
0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| OSV | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | jupyterhub-ltiauthenticator | >=1.3.0, <1.4.0 <=1.3.0 |
1.4.0 |
Affected products
- jupyterhub ltiauthenticator
Classification
- Weakness
-
- CWE-347 Improper Verification of Cryptographic Signature
References
-
github.com
/jupyterhub/ltiauthenticator/security/advisories/GHSA-mcgx-2gcr-p3hp
web, vendor-advisory, advisory
-
github.com
/jupyterhub/ltiauthenticator/blob/3feec2e81b9d3b0ad6b58ab4226af640833039f3/ltiauthenticator/lti13/validator.py
web, product
-
github.com
/jupyterhub/ltiauthenticator/blob/main/CHANGELOG.md#140---2023-03-01
web, release-notes, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2023-25574
advisory
-
github.com
/jupyterhub/ltiauthenticator
package
-
github.com
/pypa/advisory-database/tree/main/vulns/jupyterhub-ltiauthenticator/PYSEC-2025-120.yaml
web
Sources
- CVE List CVE-2023-25574
- GitHub Advisory GHSA-mcgx-2gcr-p3hp
- NVD CVE-2023-25574
- OSV PYSEC-2025-120
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.