CVE-2023-28370 Open redirect in Tornado
Medium 6.1
Published
Updated
Check this codebase for CVE-2023-28370 and fix it if it is affected.
What it is: CVE-2023-28370 is a medium-severity vulnerability in tornadoweb Tornado, published on 25 May 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-28370 in the wild and no public exploit code.
Affected packages and fixed versions:
- tornado (PyPI): affected all versions; fixed in 6.3.2
- tornado (PyPI): affected all versions; fixed in 6.3.2
- tornado (PyPI): affected all versions; fixed in 6.3.2
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2023-28370/ (Markdown: https://insights.sbomify.com/CVE-2023-28370/index.md)
Remote attackers can redirect users to malicious sites via crafted URLs, facilitating phishing attacks against applications using the Tornado web framework.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-28370?
CVE-2023-28370 is a medium-severity vulnerability in tornadoweb Tornado, published on 25 May 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-601
Which versions are affected by CVE-2023-28370?
3 open source packages ship an affected version, including tornado. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
tornado PyPI | All versions | 6.3.2 |
tornado PyPI | All versions | 6.3.2 |
tornado PyPI | All versions | 6.3.2 |
Linux distribution packages (37)
python3-tornado AlmaLinux:9 | All versions | 6.1.0-9.el9 |
python-tornado Red Hat:enterprise_linux:9::appstream | All versions | 0:6.1.0-9.el9 |
python-tornado-debugsource Red Hat:enterprise_linux:9::appstream | All versions | 0:6.1.0-9.el9 |
python3-tornado Red Hat:enterprise_linux:9::appstream | All versions | 0:6.1.0-9.el9 |
python3-tornado-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:6.1.0-9.el9 |
saltbundlepy-psutil SUSE:EL-9:Update:Products:SaltBundle:Update | All versions | 5.8.0-1.9.1 |
venv-salt-minion SUSE:EL-9:Update:Products:SaltBundle:Update | All versions | 3006.0-1.19.2 |
python-tornado SUSE:Enterprise Storage 7 | All versions | 4.5.3-150000.3.6.1 |
salt SUSE:Enterprise Storage 7 | All versions | 3006.0-150200.101.2 |
python-tornado SUSE:Enterprise Storage 7.1 | All versions | 4.5.3-150000.3.6.1 |
salt SUSE:Enterprise Storage 7.1 | All versions | 3006.0-150300.53.53.2 |
python-tornado SUSE:HPE Helion OpenStack 8 | All versions | 4.4.3-3.3.1 |
python-tornado SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | All versions | 4.5.3-150000.3.6.1 |
salt SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | All versions | 3006.0-150100.100.2 |
python-tornado SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | All versions | 4.5.3-150000.3.6.1 |
salt SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | All versions | 3006.0-150200.101.2 |
python-tornado SUSE:Linux Enterprise High Performance Computing 15 SP3-ESPOS | All versions | 4.5.3-150000.3.6.1 |
salt SUSE:Linux Enterprise High Performance Computing 15 SP3-ESPOS | All versions | 3006.0-150300.53.53.2 |
python-tornado SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | All versions | 4.5.3-150000.3.6.1 |
salt SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | All versions | 3006.0-150300.53.53.2 |
salt SUSE:Linux Enterprise Micro 5.1 | All versions | 3006.0-150300.53.53.2 |
python-tornado SUSE:Linux Enterprise Micro 5.2 | All versions | 4.5.3-150000.3.6.1 |
salt SUSE:Linux Enterprise Micro 5.2 | All versions | 3006.0-150300.53.53.2 |
python-tornado SUSE:Linux Enterprise Micro 5.3 | All versions | 4.5.3-150000.3.6.1 |
salt SUSE:Linux Enterprise Micro 5.3 | All versions | 3006.0-150400.8.37.2 |
python-tornado SUSE:Linux Enterprise Micro 5.4 | All versions | 4.5.3-150000.3.6.1 |
salt SUSE:Linux Enterprise Micro 5.4 | All versions | 3006.0-150400.8.37.2 |
python-tornado SUSE:Linux Enterprise Module for Advanced Systems Management 12 | All versions | 4.2.1-17.7.1 |
python-tornado SUSE:Linux Enterprise Module for Basesystem 15 SP4 | All versions | 4.5.3-150000.3.6.1 |
salt SUSE:Linux Enterprise Module for Basesystem 15 SP4 | All versions | 3006.0-150400.8.37.2 |
python-tornado SUSE:Linux Enterprise Module for Basesystem 15 SP5 | All versions | 4.5.3-150000.3.6.1 |
salt SUSE:Linux Enterprise Module for Basesystem 15 SP5 | All versions | 3006.0-150500.4.12.2 |
salt SUSE:Linux Enterprise Module for Server Applications 15 SP4 | All versions | 3006.0-150400.8.37.2 |
salt SUSE:Linux Enterprise Module for Server Applications 15 SP5 | All versions | 3006.0-150500.4.12.2 |
salt SUSE:Linux Enterprise Module for Transactional Server 15 SP4 | All versions | 3006.0-150400.8.37.2 |
salt SUSE:Linux Enterprise Module for Transactional Server 15 SP5 | All versions | 3006.0-150500.4.12.2 |
python-tornado SUSE:Linux Enterprise Real Time 15 SP3 | All versions | 4.5.3-150000.3.6.1 |
Products include Tornadoweb Tornado.
How do I fix CVE-2023-28370?
Upgrade tornado to 6.3.2 or later.
Is CVE-2023-28370 being exploited?
There is no known exploitation of CVE-2023-28370 in the wild and no public exploit code.
Other vulnerabilities in tornadoweb Tornado
- CVE-2026-31958 Tornado has a DoS due to too many multipart parts
- CVE-2025-67725 Tornado is Vulnerable to Quadratic DoS via Repeated Header Coalescing
- CVE-2025-67726 Tornado is Vulnerable to Quadratic DoS via Crafted Multipart Parameters
- CVE-2024-52804 Tornado has HTTP cookie parsing DoS vulnerability
- CVE-2026-35536 Tornado has incomplete validation of cookie attributes
Sources
Also known as ALSA-2023:6523, AZL-43486, AZL-44277, CLSA-2026-1786433207, CLSA-2026-1786442009, DEBIAN-CVE-2023-28370 and 24 more.