CVE-2025-25200
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductKoa
PublishedFeb 12, 2025
First seenFeb 12, 2025
Weakness typeCWE-1333CWE-1333
How to fix
Update
- koajs koa0.21.2, 1.7.1, 2.15.4 or later
- koa2.15.4, 3.0.0-alpha.3, 1.7.1, 0.21.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| koajs koa | v < 0.21.2, 1.0.0 ≤ v < 1.7.1, 2.0.0 ≤ v < 2.15.4, 3.0.0 | 0.21.2, 1.7.1, 2.15.4 |
| koanpm | 2.0.0 ≤ v < 2.15.4, 3.0.0-alpha.0 ≤ v < 3.0.0-alpha.3, 1.0.0 ≤ v < 1.7.1, v < 0.21.2 | 2.15.4, 3.0.0-alpha.3, 1.7.1, 0.21.2 |
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