CVE-2025-67724 Details
Tornado is a Python web framework and asynchronous networking library. In versions 6.5.2 and below, the supplied reason phrase is used unescaped in HTTP headers (where it could be used for header injection) or in HTML in the default error page (where it could be used for XSS) and can be exploited by passing untrusted or malicious data into the reason argument. Used by both RequestHandler.set_status and tornado.web.HTTPError, the argument is designed to allow applications to pass custom "reason" phrases (the "Not Found" in HTTP/1.1 404 Not Found) to the HTTP status line (mainly for non-standard status codes). This issue is fixed in version 6.5.3.
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Exploit prediction scoring system (EPSS) score for CVE-2025-67724
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.04 Probability of exploitation activity being observed over the next 30 days (11th percentile)
CVSS score for CVE-2025-67724
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
5.4 Medium
Products affected by CVE-2025-67724
Tornado 4.5.2
Tornado 4.5.3
Tornado 5.0.1
Tornado 5.0.2
Tornado 5.1.1
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2025-67724 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 669 43.47%
CN 162 10.53%
DE 112 7.28%
GB 47 3.05%
KR 45 2.92%
JP 45 2.92%
SG 44 2.86%
FR 44 2.86%
IE 35 2.27%
IN 33 2.14%

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CVE-2025-67724 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 1,044 84.47%
Telecommunications 127 10.28%
Education 42 3.40%
Government/Politics 6 0.49%
Business Services 4 0.32%
Retail 3 0.24%
Media/Entertainment 3 0.24%
Healthcare/Wellness 2 0.16%
Utilities 1 0.08%
Energy/Resources 1 0.08%

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