CVE-2023-39968 json
Open Redirect Vulnerability in jupyter-server
published 2023-08-28 3 y ago modified 2026-09-10 1 mo ago also GHSA-r726-vmfq-j9j3 , PYSEC-2023-155 , EUVD-2023-0102
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 52%
- public exploits
- 0
- none known
Summary
jupyter-server is the backend for Jupyter web applications. Open Redirect Vulnerability. Maliciously crafted login links to known Jupyter Servers can cause successful login or an already logged-in session to be redirected to arbitrary sites, which should be restricted to Jupyter Server-served URLs. This issue has been addressed in commit `29036259` which is included in release 2.7.2. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Patch / fix
- pypi jupyter-server 2.7.2
- jupyter jupyter_server 2.7.2
- jupyter-server Debian 14, Debian 13 2.14.2-1
debian advisories DEBIAN-CVE-2023-39968
- python-jupyter-server openSUSE Tumbleweed 2.20.0-1.3
opensuse advisories openSUSE-SU-2026:12012-1
- jupyter-server Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 2.7.3-r0
alpine advisories ALPINE-CVE-2023-39968
Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2023-39968 updated cvss 4.3
python-jupyter-server: Open Redirect Vulnerability
-
Red Hat All currently supported Red Hat productsnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| OSV | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | jupyter-server | <2.7.2 |
2.7.2 |
Affected products
- jupyter-server jupyter_server
Classification
- Weakness
-
- CWE-601 URL Redirection to Untrusted Site
References
-
github.com
/jupyter-server/jupyter_server/commit/290362593b2ffb23c59f8114d76f77875de4b925
web, patch
-
github.com
/jupyter-server/jupyter_server/security/advisories/GHSA-r726-vmfq-j9j3
web, vendor-advisory, advisory
- lists.fedoraproject.org /archives/list/package-announce@lists.fedoraproject.org/message/XDKQAWQN6SQTOVACZNXYKEHWQXGG4DOF/
- lists.fedoraproject.org /archives/list/package-announce@lists.fedoraproject.org/message/NRP7DNZYVOIA4ZB3U3ZWKTFZEPYWNGCQ/
-
nvd.nist.gov
/vuln/detail/CVE-2023-39968
advisory
-
blog.xss.am
/2023/08/cve-2023-39968-jupyter-token-leak
web
-
github.com
/jupyter-server/jupyter_server
package
-
github.com
/pypa/advisory-database/tree/main/vulns/jupyter-server/PYSEC-2023-155.yaml
web
-
lists.fedoraproject.org
/archives/list/package-announce@lists.fedoraproject.org/message/NRP7DNZYVOIA4ZB3U3ZWKTFZEPYWNGCQ
web
-
lists.fedoraproject.org
/archives/list/package-announce@lists.fedoraproject.org/message/XDKQAWQN6SQTOVACZNXYKEHWQXGG4DOF
web
Sources
- CVE List CVE-2023-39968
- GitHub Advisory GHSA-r726-vmfq-j9j3
- NVD CVE-2023-39968
- OSV PYSEC-2023-155
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.