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CVE-2025-47287

7.5 · HIGH

Tornado is a Python web framework and asynchronous networking library.

Published May 15, 2025CWE-770EPSS 0.74%

Overview

CVE-2025-47287 is a high-severity vulnerability. It was published on May 15, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Tornado is a Python web framework and asynchronous networking library. When Tornado's ``multipart/form-data`` parser encounters certain errors, it logs a warning but continues trying to parse the remainder of the data. This allows remote attackers to generate an extremely high volume of logs, constituting a DoS attack. This DoS is compounded by the fact that the logging subsystem is synchronous. All versions of Tornado prior to 6.5.0 are affected. The vulnerable parser is enabled by default. Upgrade to Tornado version 6.50 to receive a patch. As a workaround, risk can be mitigated by blocking `Content-Type: multipart/form-data` in a proxy.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/tornadoweb/tornado/commit/b39b892bf78fe8fea01dd45199aa88307e7162f3GitHubgithub.com/tornadoweb/tornado/security/advisories/GHSA-7cx3-6m66-7c5mReflists.debian.org/debian-lts-announce/2025/05/msg00038.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-47287?

CVE-2025-47287 is a high-severity vulnerability. It was published on May 15, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-47287?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-47287?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-47287?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-47287 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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