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CVE-2025-25200 Detail

Description

Koa is expressive middleware for Node.js using ES2017 async functions. Prior to versions 0.21.2, 1.7.1, 2.15.4, and 3.0.0-alpha.3, Koa uses an evil regex to parse the `X-Forwarded-Proto` and `X-Forwarded-Host` HTTP headers. This can be exploited to carry out a Denial-of-Service attack. Versions 0.21.2, 1.7.1, 2.15.4, and 3.0.0-alpha.3 fix the issue.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  GitHub, Inc.
CVSS-B 9.2 CRITICAL
Vector:  CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/koajs/koa/blob/master/lib/request.js#L259
https://github.com/koajs/koa/blob/master/lib/request.js#L404
https://github.com/koajs/koa/commit/5054af6e31ffd451a4151a1fe144cef6e5d0d83c
https://github.com/koajs/koa/commit/5f294bb1c7c8d9c61904378d250439a321bffd32
https://github.com/koajs/koa/commit/93fe903fc966635a991bcf890cfc3427d33a1a08
https://github.com/koajs/koa/releases/tag/2.15.4
https://github.com/koajs/koa/security/advisories/GHSA-593f-38f6-jp5m

Weakness Enumeration

CWE-ID CWE Name Source
CWE-1333 Inefficient Regular Expression Complexity GitHub, Inc.  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-25200
NVD Published Date:
02/12/2025
NVD Last Modified:
02/12/2025
Source:
GitHub, Inc.