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CVE-2023-28370

21
FAUCET Score

CVE-2023-28370 is an open redirect vulnerability affecting Tornado versions 6.3.1 and earlier. This flaw allows an unauthenticated attacker to redirect users to arbitrary malicious websites via a specially crafted URL, facilitating phishing attacks. Rated as Medium severity with a CVSS score of 6.1, it requires user interaction and has low impact on confidentiality and integrity. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.3.2CPE matchmatch criteria
cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.13%
Probability of exploitation in next 30 days
EPSS Percentile
63.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0113 is in the 76th percentile among its peer group of 26,220 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia msrc
Product: azl3 python-tornado 6.3.3-11 on Azure Linux 3.0Fixed in: 6.3.3-11
pippatch availablevia ghsa
Product: tornadoFixed in: 6.3.2
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: python-tornado-0:6.1.0-9.el9
View patch

Vendor Advisories (3)

pipGHSA-hj3f-6gcp-jg8jmedium

Open redirect in Tornado

May 25, 2023
redhatCVE-2023-28370Moderate

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

May 25, 2023
microsoft2023-May/CVE-2023-28370Moderate

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.

May 9, 2023

References

lists.debian.org / debian-lts-announce/2025/01/msg00000.html
github.com / tornadoweb/tornado/releases/tag/v6.3.2
Product
jvn.jp / en/jp/JVN45127776
Third Party Advisory