CVE-2022-21697

SSRF vulnerability (requires authentication)

HIGH
7.1
CVSS Score
Published: January 25, 2022 at 01:55 PM UTC
Updated: June 17, 2026 at 04:26 AM UTC
2 products affected across 2 vendorsJupyter Server ProxyJupyter Server Proxy

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Severity
HIGH7.1
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 3.2.1
Affected range stops below 3.2.1, so it looks safe — our inference, not a vendor statement
v < 3.2.1
Affected range stops below 3.2.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-918

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