What is CVE-2025-67724?

CVE-2025-67724 is a medium-severity vulnerability in Tornadoweb Tornado, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-12-12.

How severe is CVE-2025-67724?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Tornadoweb Tornado

CVE-2025-67724

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…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (10.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Tornadoweb Tornado — versions < 6.5.3

Weakness classification (CWE)

References

https://github.com/tornadoweb/tornado/security/advisories/GHSA-pr2v-jx2c-wg9f (x_refsource_CONFIRM)
https://github.com/tornadoweb/tornado/commit/9c163aebeaad9e6e7d28bac1f33580eb00b0e421 (x_refsource_MISC)
https://github.com/tornadoweb/tornado/releases/tag/v6.5.3 (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-67724?: CVE-2025-67724 is a medium-severity vulnerability in Tornadoweb Tornado, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-12-12.
How severe is CVE-2025-67724?: Medium severity. CVSS v3 base score is 5.4 out of 10.