Is CVE-2025-47287 actively exploited?

CVE-2025-47287 has no public evidence of in-the-wild exploitation as of 2025-12-23.

What is the CVSS score for CVE-2025-47287?

CVE-2025-47287 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2025-47287?

Patch guidance is available from tornadoweb security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-47287.

Fix CVE-2025-47287 - HIGH tornadoweb tornado

Q: Which products are affected by CVE-2025-47287?

2 products: tornadoweb tornado, debian debian linux.

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-770

Metadata

Primary Vendor: TORNADOWEB
Published: 5/15/2025
Last Modified: 12/23/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

tornadoweb : tornadodebian : debian_linux

Remediation Guidance

Executive Summary

Cite this page

CVE-2025-47287. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2025-47287

View on NIST NVD

CVE-2025-47287 vulnerability