SSRF in Jupyter Server Proxy
CVE-2022-21697
Jupyter Server Proxy is a Jupyter notebook server extension to proxy web services. Versions of Jupyter Server Proxy prior to 3.2.1 are vulnerable to Server-Side Request Forgery (SSRF). Any user deploying Jupyter Server or Notebook with jupyter-proxy-server extension enabled is affected. A lack of input validation allows authenticated clients to proxy requests to other hosts, bypassing the `allowed_hosts` check. Because authentication is required, which already grants permissions to make the same requests via kernel or terminal execution, this is considered low to moderate severity. Users may upgrade to version 3.2.1 to receive a patch or, as a workaround, install the patch manually.
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.011 (62.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N.
Affected products
- Jupyter Jupyter_server_proxy
- Jupyterhub Jupyter-server-proxy — versions < 3.2.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2022-21697?
- CVE-2022-21697 is a medium-severity vulnerability in Jupyter Server Proxy, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.3/10. Published 2022-01-25.
- How severe is CVE-2022-21697?
- Medium severity. CVSS v3 base score is 6.3 out of 10.