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Fencer Vulns
medium 6.1

CVE-2023-28370 json

Open redirect in Tornado

published 2023-05-25 3 y ago modified 2026-06-17 4 mo ago also GHSA-hj3f-6gcp-jg8j , PYSEC-2023-75 , EUVD-2023-0248

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

Open redirect vulnerability in Tornado versions 6.3.1 and earlier allows a remote unauthenticated attacker to redirect a user to an arbitrary web site and conduct a phishing attack by having user access a specially crafted URL.

Patch / fix

  • pypi tornado 6.3.2
  • tornadoweb tornado 6.3.2
  • python-tornado Debian 12 6.2.0-3+deb12u1
  • python-tornado Debian 14, Debian 13 6.3.2-1

debian advisories DEBIAN-CVE-2023-28370

  • python-tornado Ubuntu Pro 16.04 LTS 4.2.1-1ubuntu3.1+esm1
  • python-tornado Ubuntu Pro 18.04 LTS 4.5.3-1ubuntu0.2+esm1
  • python-tornado Ubuntu Pro 20.04 LTS 6.0.3+really5.1.1-3ubuntu0.1~esm1
  • python-tornado Ubuntu Pro 22.04 LTS 6.1.0-3ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2023-28370

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • python-tornado RHEL 9 6.1.0-9.el9
  • python3-tornado RHEL 9 6.1.0-9.el9

red hat advisories RHSA-2023:6523

  • salt SLE Module for Transactional Server 15 SP4, SLE Module for Server Applications 15 SP4, SLE Module for Basesystem 15 SP4 +5 more 3006.0-150400.8.37.2
  • spacecmd openSUSE Leap 15.5, openSUSE Leap 15.4, Manager Client Tools 15 4.3.22-150000.3.101.1
  • python-tornado SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES for SAP 15 SP1 +21 more 4.5.3-150000.3.6.1
  • system-user-prometheus openSUSE Leap 15.5, openSUSE Leap 15.4, Manager Server Module 4.3 +5 more 1.0.0-150000.10.1
  • prometheus-blackbox_exporter openSUSE Leap 15.5, openSUSE Leap 15.4, Manager Proxy Module 4.3 +3 more 0.24.0-150000.1.20.2
  • salt SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Real Time 15 SP3 +7 more 3006.0-150300.53.53.2
  • venv-salt-minion Manager Server Module 4.3, Manager Proxy Module 4.3, Manager Client Tools for SLE Micro 5 +1 more 3006.0-150000.3.35.1
  • salt SLE Module for Transactional Server 15 SP5, SLE Module for Server Applications 15 SP5, SLE Module for Basesystem 15 SP5 +1 more 3006.0-150500.4.12.2

suse advisories SUSE-SU-2023:3145-1SUSE-SU-2023:3144-1SUSE-SU-2023:3143-1SUSE-SU-2023:3142-1SUSE-SU-2023:3139-1SUSE-EL-9-CLIENT-TOOLS-2023-3137

  • python-tornado6 openSUSE Tumbleweed 6.5.7-2.1

opensuse advisories openSUSE-SU-2026:11239-1

  • python3-tornado AlmaLinux 9 6.1.0-9.el9

almalinux advisories ALSA-2023:6523

  • python-tornado Azure Linux 3.0 6.3.3-11

azure linux advisories AZL-44277

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2023-28370 updated cvss 7.4

python-tornado: open redirect vulnerability in StaticFileHandler under certain configurations

  • Red Hat Enterprise Linux 7 python-tornado
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 9) python-tornado 6.1.0-9.el9, python3-tornado 6.1.0-9.el9
    fixed: vendor fix RHSA-2023:6523
  • Red Hat Enterprise Linux 8 pcs, pcs-snmp Red Hat Enterprise Linux 9 pcs, pcs-snmp Red Hat OpenShift Container Platform 4 python-tornado
    not 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
21 mo ago

Exploit prediction

1.14% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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
CNA 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 tornado
<6.3.2
6.3.2

Affected products

  • tornadoweb Tornado

Classification

Weakness
  • CWE-601 URL Redirection to Untrusted Site

References

Sources

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.