CVE-2025-25200
critical · 9.2Koa 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.
9.2
CVSS
0.8%
EPSS (exploit prob.)
56th
EPSS percentile
2025-02-12
Published
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weaknesses
CWE-1333
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| koajs | koa | < 0.21.2 |
| koajs | koa | >= 1.0.0, < 1.7.1 |
| koajs | koa | >= 2.0.0, < 2.15.4 |
| koajs | koa | 3.0.0 |
| koajs | koa | 3.0.0 |
| koajs | koa | 3.0.0 |
Check a specific version with /api/v1/cve/match.
References
- 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
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2025-25200